Juniors

Groth and Andrew Kennaugh of Great Britain lost in the finals of the 2005 Wimbledon boys' doubles championship to Jesse Levine and Michael Shabaz 6–4, 6–1.^[3]

2007–2013: Fastest serve on record

Groth beat Mark Philippoussis in a 2007 match; Philippoussis subsequently focused on the seniors tour. Groth qualified for the ATP event in Nottingham where he defeated Britain's Jamie Baker 7–6, 6–3 in the first round. He lost his second round match to seeded Gilles Simon 7–6^(7–1), 4–6, 4–6.

At the 2009 Australian Open he set a record for the fastest serve by a male player (232 km/h). He lost in the qualification to Wimbledon 2009 to Jesse Levine 4–6, 7–6, 5–7.^[4]

In 2012, in an ATP Challenger in Busan, Groth hit the fastest serve on record with a 163.4 mph (6.4 km/h) ace, but lost the match to Uładzimir Ihnatsik, 4–6, 3–6.^[5]

In November 2013, he reached the final of the Champaign Challenger, eventually losing in 3 sets to Tennys Sandgren 6–3, 3–6, 6–7. However, by reaching the final there, and the semi-final of Toyota Challenger the following week, his ranking improved to a career high of #173.

2014

In 2014, Groth was awarded a wild card into the main draw at the Brisbane International, where he made the quarter-finals. This is his first ATP World Tour quarter final appearance.

On 8 January, Groth was awarded a wild card into the 2014 Australian Open,^[6] but lost in round one to 28th seed, Vasek Pospisil in straight sets.

In March, Groth qualified for Indian Wells Masters, but lost in round 1 to Mikhail Kukushkin, 4–7 in the third set tie-break.

On 17 March, Groth entered and won the Rimouski Challenger in Canada. This was his first Challenger tour title. Two weeks later, he made the final of the León Challenger, but lost to #1 seed, Rajeev Ram. This gave him a new career high ranking of 136.

At the 2014 French Open, Groth made it to the last round of qualifying, but lost to Simone Bolelli 4–6, 2–6. This was his best French Open result to date. He partnered Andrey Golubev in the Men's doubles, where they made it to the semi-final. This increased his doubles ranking to a career high of #41. In June, Groth made the final of the 2014 Aegon Nottingham Challenge but lost to compatriot Nick Kyrgios 6–7^(3–7), 6–7^(7–9). Groth made his Wimbledon debut after winning his way through qualifying, but lost in round 1 to Alexandr Dolgopolov in three sets. In July. Groth entered the Hall of Fame Tennis Championships, where he reached his maiden ATP semi-final, defeating defending champion Nicolas Mahut in the quarter-finals. This achievement saw him break into the top 100 rankings for the first time.^[7]

In August, Groth won his first Grand Slam match, defeating Albert Ramos Viñolas 6–3, 7–6^(7–5), 6–3 in the 2014 US Open. In the second round, he was defeated by Roger Federer in straight sets 4–6, 4–6, 4–6.

2015

Groth started the 2015 season at the 2015 Brisbane International, where he was awarded a wild card into the main draw. He defeated defending champion Lleyton Hewitt in round one, and then Łukasz Kubot in the second round before losing to eventual finalist Milos Raonic in the quarter-finals 6–7^(5–7), 6–3, 6–7^(2–7). At the Australian Open, Groth defeated Filip Krajinović in round one, Thanasi Kokkinakis in round two before losing to Bernard Tomic in round 3. This was his best grand slam performance to date. In February, Groth headed to North America and lost in round 2 of Memphis to eventual runner-up Kevin Anderson. Groth lost in round 1 of Delray, Acapulco, Indian Wells and Miami. He then played the 2015 U.S. Men's Clay Court Championships and defeated Víctor Estrella Burgos in the first round. He then played top seed Feliciano López in the second round but lost in straight sets.

Groth then played at the Santaizi Challenger as the 2nd seed. He cruised through to the final where he defeated Konstantin Kravchuk to win the title. His next tournament was the Busan Open where he was again the 2nd seed. He defeated compatriot Alex Bolt in the first round but then lost to Franko Škugor. At the 2015 French Open, Groth led 21st seed Pablo Cuevas by a set in round 1, before losing in 4 sets.

Groth with Sergiy Stakhovsky at the 2015 Wimbledon Championships.

Groth started his grass court season at the Manchester Challenger where he reached the final and defeated compatriot Luke Saville to win the title. He then competed at the ATP 2015 Mercedes Cup where he defeated Sergiy Stakhovsky in the first round. He then scored his first top 20 win by defeating world number 12 Feliciano López to reach the quarter-final. At Wimbledon, Groth defeated 31st seed Jack Sock in round 1, compatriot James Duckworth in round 2^[8] and set up a round 3 match against Roger Federer. In this 3rd round match, he made the second fastest serve ever at the Wimbledon tournament (147 mph), and was the only player to take a set off of Federer until the final, losing to the 7-time champion 4–6, 4–6, 7–6^(7–5), 2–6. Groth then represented Australia at the 2015 Davis Cup Quarterfinals. Australia was down 2–0 to Kazakhstan when Groth played the doubles rubber with Lleyton Hewitt. The pair won in straight sets to take the tie to 2–1. Groth then replaced Nick Kyrgios to play Mikhail Kukushkin where he defeated him in 4 sets to level the tie at 2–2. Hewitt then won the 5th rubber to ensure Australia a place in the Davis Cup semi-finals. Groth next contested the Bogotá Open as the 6th seed where he defeated Guido Pella before losing to former world number 8 Radek Štěpánek in straight sets. He then played in Atlanta and defeated Frances Tiafoe in the first round. He then lost to eventual finalist and fifth seed Marcos Baghdatis in 3 sets. Groth then competed at the 2015 Citi Open and reached his first ATP500 Quarterfinal after defeating Thomaz Bellucci, 9th seeded Viktor Troicki and 7th seeded Feliciano López before losing to eventual champion Kei Nishikori. This was also the first time Groth defeated back to back top 20 players. Groth next played at the 2015 Winston-Salem Open and defeated Jared Donaldson before losing to eventual semi-finalist Steve Johnson. Groth then played at the 2015 US Open, defeating former world number 13 Alexandr Dolgopolov in round 1, but then losing to 26th seed Tommy Robredo in round 2. Groth also played the Men's doubles with Lleyton Hewitt, losing in the 2nd round.

2016: Loss of form

Groth commenced the 2016 season with a wild card into Brisbane International. He lost to Chung Hyeon in round one. He also lost in round one at the Sydney International to Federico Delbonis. At the Australian Open, Groth defeated Adrian Mannarino before losing to number 2 seed Andy Murray in the second round. Groth partnered Lleyton Hewitt in the men's double at the Australian Open. They made the third round. Groth then had a first round to Frances Tiafoe loss at a Dallas Challenger. Groth had another first round loss to Illya Marchenko at the Memphis Open. Groth lost in the first round to Noah Rubin in the Delray Beach International Tennis Championships. Groth also lost in the first round in Acapulco to Dmitry Tursunov. Groth played for Australia in Davis Cup World Group losing his singles match to John Isner in straight sets. He had a first round loss at the first Masters 1000 of the year at Indian Wells to Leonardo Mayer. Groth then defeated Víctor Estrella Burgos at the Miami but he lost to Dominic Thiem in the second round. Groth played a number of Challenger tournaments across Asia with little success. At the 2016 French Open, Groth lost in round 1 to 9-time champion Rafael Nadal. At 2016 Wimbledon, Groth lost in round 1 to Kei Nishikori. Groth had a last minute call-up to represent Australia at the 2016 Summer Olympics in Rio de Janeiro, but lost in the first round to Belgium's David Goffin. Groth played across North America with limited success on the singles ATP World Tour, but won his second doubles title in Newport before returning to the Challenger Circuit, winning his 4th single title in Las Vegas. Groth ended 2016 with a ranking of 185.

2017

Groth commenced the 2017 with a wild card into the 2017 Brisbane International, where he defeated Pierre-Hugues Herbert before losing to Dominic Thiem in round 2. Groth reached the quarter-final of the 2017 Canberra Challenger, losing to eventual champion Dudi Sela. Groth lost in round 1 of the 2017 Australian Open to Steve Darcis, but paired with Chris Guccione to reach the quarter-final of the doubles, losing to eventual champions Henri Kontinen and John Peers. In February, Groth was selected to play in round 1 the 2017 Davis Cup against Czech Republic, he paired with John Peers to win the doubles taking Australia to an unbeatable 3–0. Groth went to North America but lost in qualifying for Indian Wells Masters and Drummondville Challenger singles but won the doubles at Drummondville. In June, Groth made the semi-final of Ilkley Trophy.

2018: Retirement

2018 Australian Open turned out to be Groth's last tournament before retirement. He lost in singles qualifying to Taylor Fritz. He paired with former world no. 1 compatriot Lleyton Hewitt in doubles and reached the quarterfinals. He paired with compatriot Samantha Stosur in mixed doubles.^[9]

Doubles: 5 (2 titles, 3 runner-ups)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Jul 2014	Colombia Open, Colombia	250 Series	Hard	Chris Guccione	Nicolás Barrientos Juan Sebastián Cabal	7–6(7–5), 6–7(3–7), [11–9]
Loss	1–1	Aug 2014	Washington Open, United States	500 Series	Hard	Leander Paes	Jean-Julien Rojer Horia Tecău	5–7, 4–6
Loss	1–2	Sep 2014	Shenzhen Open, China	250 Series	Hard	Chris Guccione	Jean-Julien Rojer Horia Tecău	4–6, 6–7(4–7)
Loss	1–3	Oct 2014	Kremlin Cup, Russia	250 Series	Hard (i)	Chris Guccione	František Čermák Jiří Veselý	6–7(2–7), 5–7
Win	2–3	Jul 2016	Hall of Fame Tennis Championships, United States	250 Series	Grass	Chris Guccione	Jonathan Marray Adil Shamasdin	6–4, 6–3

Singles: 22 (11–11)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Oct 2006	Australia F12, Mildura	Futures	Grass	Alun Jones	6–3, 5–7, 4–6
Loss	0–2	Oct 2007	Australia F7, Gloucester	Futures	Clay	Miles Armstrong	7–6(8–6), 1–6, 3–6
Win	1–2	Apr 2009	USA F7, Mobile	Futures	Hard	Jesse Witten	6–2, 3–0 ret.
Loss	1–3	May 2009	Fergana, Uzbekistan	Challenger	Hard	Lukáš Lacko	6–4, 5–7, 6–7(4–7)
Win	2–3	Oct 2010	Turkey F9, Antalya	Futures	Hard	Radu Albot	6–3, 6–1
Win	3–3	Oct 2010	Turkey F10, Antalya	Futures	Hard	Artem Smirnov	6–4, 6–2
Loss	3–4	Nov 2010	Australia F12, Traralgon	Futures	Hard	Amir Weintraub	2–6, 4–6
Win	4–4	Dec 2010	Australia F13, Bendigo	Futures	Hard	Benjamin Mitchell	7–6(9–7), 6–4
Loss	4–5	Feb 2012	Burnie, Australia	Challenger	Hard	Danai Udomchoke	6–7(5–7), 3–6
Win	5–5	Mar 2012	Australia F3, Ipswich	Futures	Clay	Jason Kubler	5–7, 6–3, 6–2
Win	6–5	May 2012	Korea F1, Daegu	Futures	Hard	Frederik Nielsen	6–7(4–7), 6–4, 6–1
Loss	6–6	May 2012	Korea F2, Changwon	Futures	Hard	Michał Przysiężny	6–3, 5–7, 3–6
Loss	6–7	Sep 2012	Australia F6, Alice Springs	Futures	Hard	Matthew Barton	6–7(3–7), 3–6
Win	7–7	Feb 2013	Australia F2, Mildura	Futures	Grass	Matthew Barton	6–1, 6–4
Loss	7–8	Nov 2013	Champaign-Urbana, United States	Challenger	Hard	Tennys Sandgren	6–3, 3–6, 6–7(4–7)
Win	8–8	Mar 2014	Rimouski, Canada	Challenger	Hard	Ante Pavić	7–6(7–3), 6–2
Loss	8–9	Apr 2014	Leon, Mexico	Challenger	Hard	Rajeev Ram	2–6, 2–6
Loss	8–10	Jun 2014	Nottingham, United Kingdom	Challenger	Grass	Nick Kyrgios	6–7(3–7), 6–7(7–9)
Loss	8–11	Nov 2014	Knoxville, United States	Challenger	Hard	Adrian Mannarino	6–3, 6–7(6–8), 4–6
Win	9–11	May 2015	Taipei, Taiwan	Challenger	Carpet	Konstantin Kravchuk	6–7(5–7), 6–4, 7–6(7–3)
Win	10–11	Jun 2015	Manchester, United Kingdom	Challenger	Grass	Luke Saville	7–5, 6–1
Win	11–11	Oct 2016	Las Vegas, United States	Challenger	Hard	Santiago Giraldo	6–7(4–7), 6–4, 7–5

Doubles: 40 (30–10)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Nov 2005	Australia F11, Barmera	Futures	Grass	Joseph Sirianni	Callum Beale Joel Kerley	6–2, 5–7, [10–4]
Loss	1–1	Jul 2006	Great Britain F10, Frinton-on-Sea	Futures	Grass	Andrew Coelho	Andrew Kennaugh Tom Rushby	5–7, 7–6(7–3), 4–6
Loss	1–2	Sep 2006	France F12, Bagnères-de-Bigorre	Futures	Hard	Paul Baccanello	Thomas Oger Nicolas Tourte	6–2, 3–6, 4–6
Loss	1–3	Mar 2007	Great Britain F6, Sunderland	Futures	Hard	Andrew Coelho	Jamie Baker Aisam Qureshi	3–6, 6–3, 3–6
Win	2–3	May 2007	Algeria F3, Algiers	Futures	Clay	Edward Seator	Matus Horecny Martin Hromec	6–3, 3–6, 6–1
Win	3–3	Jun 2007	Spain F21, Puerto Cruz	Futures	Carpet	Andrew Coelho	Agustin Boje-Ordonez Pablo Martin-Adalia	6–4, 7–6(7–5)
Win	4–3	Sep 2007	France F12, Bagnères-de-Bigorre	Futures	Hard	Andrew Coelho	Daniel King-Turner Pierrick Ysern	6–4, 4–6, [10–6]
Win	5–3	Oct 2007	Australia F7, Gloucester	Futures	Clay	Joseph Sirianni	Kaden Hensel Adam Hubble	6–4, 6–3
Win	6–3	Dec 2007	Burnie, Australia	Challenger	Hard	Joseph Sirianni	Nima Roshan José Statham	6–3, 1–6, [10–4]
Win	7–3	Feb 2008	Australia F1, Mildura	Futures	Grass	Nathan Healey	Andrew Coelho Brydan Klein	6–3, 6–4
Win	8–3	Mar 2008	Australia F3, Perth	Futures	Hard	Adam Feeney	Matthew Ebden Miles Armstrong	5–7, 6–4, [10–7]
Win	9–3	May 2008	New Delhi, India	Challenger	Hard	Colin Ebelthite	Mohammad Ghareeb Illya Marchenko	2–6, 7–6(7–5), [10–8]
Win	10–3	Aug 2009	Campos do Jordão, Brazil	Challenger	Hard	Josh Goodall	Rogério Dutra Silva Júlio Silva	7–6(7–4), 6–3
Win	11–3	Feb 2010	Burnie, Australia	Challenger	Hard	Matthew Ebden	James Lemke Dane Propoggia	6–7(8–10), 7–6(7–4), [10–8]
Win	12–3	Feb 2010	Australia F1, Mildura	Futures	Grass	Matthew Ebden	Adam Hubble Sadik Kadir	6–3, 4–6, [10–4]
Win	13–3	Feb 2010	Australia F2, Berri	Futures	Grass	Matthew Ebden	Huang Liang-chi Lee Hsin-han	6–3, 7–6(9–7)
Loss	13–4	Nov 2010	Australia F12, Traralgon	Futures	Hard	Sebastian Rieschick	Colin Ebelthite Adam Feeney	3–6, 6–4, [13–15]
Win	14–4	Feb 2011	Caloundra, Australia	Challenger	Hard	Matthew Ebden	Pavol Červenák Ivo Klec	6–3, 3–6, [10–1]
Loss	14–5	Mar 2012	Pingguo, China	Challenger	Hard	Colin Ebelthite	John Paul Fruttero Raven Klaasen	2–6, 4–6
Win	15–5	May 2012	Korea F1, Daegu	Futures	Hard	Adam Hubble	Hong Chung Suk-Young Jeong	6–1, 6–4
Loss	15–6	Jul 2012	Wuhan, China	Challenger	Hard	Adam Feeney	Sonchat Ratiwatana Sanchai Ratiwatana	4–6, 6–2, [8–10]
Loss	15–7	Sep 2012	Australia F6, Alice Springs	Futures	Hard	Michael Venus	Adam Feeney Nick Lindahl	6–4, 2–6, [8–10]
Win	16–7	Jan 2013	Nouméa, New Caledonia	Challenger	Hard	Toshihide Matsui	Artem Sitak José Statham	7–6(8–6), 1–6, [10–4]
Win	17–7	Feb 2013	West Lakes, Australia	Challenger	Hard	Matt Reid	James Duckworth Greg Jones	6–2, 6–4
Win	18–7	Feb 2013	Australia F2, Mildura	Futures	Grass	John-Patrick Smith	Colin Ebelthite Ruan Roelofse	6–3, 6–4
Win	19–7	Mar 2013	Rimouski, Canada	Challenger	Hard	John-Patrick Smith	Philipp Marx Florin Mergea	7–6(7–5), 7–6(9–7)
Loss	19–8	Apr 2013	Guadalajara, Mexico	Challenger	Hard	John-Patrick Smith	Marin Draganja Mate Pavić	7–5, 2–6, [11–13]
Loss	19–9	May 2013	Anning, China	Challenger	Clay	John-Patrick Smith	Victor Baluda Dino Marcan	7–6(7–5), 4–6, [7–10]
Win	20–9	May 2013	Kunming, China	Challenger	Hard	John-Patrick Smith	Yasutaka Uchiyama Go Soeda	6–4, 6–1
Win	21–9	Nov 2013	Knoxville, United States	Challenger	Hard	John-Patrick Smith	Carsten Ball Peter Polansky	6–7(6–8), 6–2, [10–7]
Win	22–9	Feb 2014	Dallas, United States	Challenger	Hard	Chris Guccione	Ryan Harrison Mark Knowles	6–4, 6–2
Win	23–9	Apr 2014	Leon, Mexico	Challenger	Hard	Chris Guccione	Marcus Daniell Artem Sitak	6–3, 6–4
Win	24–9	Apr 2014	Shenzhen, China	Challenger	Hard	Chris Guccione	Dominik Meffert Tim Pütz	6–3, 7–6(7–5)
Win	25–9	May 2014	Taipei, Taiwan	Challenger	Carpet	Chris Guccione	Austin Krajicek John-Patrick Smith	6–4, 5–7, [10–8]
Win	26–9	May 2014	Gimcheon, South Korea	Challenger	Hard	Chris Guccione	Austin Krajicek John-Patrick Smith	6–7(5–7), 5–7, [10–4]
Loss	26–10	Apr 2016	Leon, Mexico	Challenger	Hard	Leander Paes	Santiago González Mate Pavić	4–6, 6–3, [11–13]
Win	27–10	May 2016	Busan, South Korea	Challenger	Hard	Leander Paes	Sonchat Ratiwatana Sanchai Ratiwatana	4–6, 6–1, [10–7]
Win	28–10	Oct 2016	Stockton, United States	Challenger	Hard	Brian Baker	Matt Reid John-Patrick Smith	6–2, 4–6, [10–2]
Win	29–10	Nov 2016	Charlottesville, United States	Challenger	Hard	Brian Baker	Brydan Klein Ruan Roelofse	6–3, 6–3
Win	30–10	Mar 2017	Drummondville, Canada	Challenger	Hard	Adil Shamasdin	Matt Reid John-Patrick Smith	6–2, 2–6, [10–8]

Doubles: 1 (1 runner-up)

Result	Year	Tournament	Surface	Partner	Opponents	Score
Loss	2005	Wimbledon	Grass	Andrew Kennaugh	Jesse Levine Michael Shabaz	4–6, 1–6

Singles

Doubles

2022 Victorian election

Contesting a former safe Liberal seat, and one of the most marginal Labor-held seats at the previous election (2018), Groth stood a good chance of regaining the seat for the party. Speaking before the election, Groth stated of his possibility to win the seat: "It's been extremely positive. I'm confident, if we are to have any chance tonight of the Liberal Party and the Coalition getting into government in this state, Nepean is the one that has to turn."^[14]

Groth claimed victory of Nepean the night of the election.^[14][15] After the election, Groth was appointed as Shadow Minister for Youth and Shadow Minister for Tourism, Sport and Events in the Pesutto shadow ministry.^[16]