2009

He received a wildcard into the 2009 French Open, his ATP-tier debut. In the first round, one day before his 19th birthday, he beat Eduardo Schwank, 6–1, 6–3, 6–3.

Rufin achieved another landmark in his young career on 25 October 2009, when he won the Florianópolis Challenger title in Brazil, beating Pere Riba in the final, 6–4, 3–6, 6–3.

2010

He reached the quarterfinals of the 2010 Open 13 in Marseille. In the first round, Rufin defeated lucky loser Laurent Recouderc, 7–5, 4–6, 7–6. He followed this up by defeating Yannick Mertens of Belgium, 6–3, 2–6, 6–2. He eventually fell to World No. 92 Mischa Zverev, 7–5, 6–7, 6–3.

Rufin received a wildcard into the 2010 US Open and defeated Leonardo Mayer in four sets before losing to Paul-Henri Mathieu in the second round.

2012

2012 began well for Rufin, as he reached second ever ATP Quarter-Final in Montpellier. He defeated Canadian Vasek Pospisil 6–4 7–6 and Spaniard Feliciano López 7–6 6–3, before falling to compatriot Gilles Simon 6–7 7–6 2–6.

A strong end to the season on the ATP Challenger Tour saw Rufin enter the top 100 for the first time. Rufin's four week sojourn on the clay courts of South America comprised a win in Villa Allende, two finals in Quito and Buenos Aires and a Semin-Final in San Juan.

2013

Rufin reached the Quarter-Final of the ATP Tour event in Viña del Mar, defeating Spain's Rubén Ramírez Hidalgo 6–3 6–4 and Argentina's Juan Mónaco 7–6 6–4. He had to withdraw before his scheduled match with Carlos Berlocq.

2015: Retirement

Rufin retired in spring 2015 due to persistent injuries.^[1]

Singles: 7 (3–4)

Outcome	No.	Date	Tournament	Surface	Opponent	Score
Winner	1.	25 October 2009	Florianópolis, Brazil	Clay	Pere Riba	6–4, 3–6, 6–3
Runner-up	1.	15 July 2012	Timișoara, Romania	Clay	Victor Hănescu	0–6, 3–6
Runner-up	2.	7 October 2012	Quito, Ecuador	Clay	João Souza	2–6, 6–7(4–7)
Winner	2.	21 October 2012	Villa Allende, Argentina	Clay	Javier Martí	6–2, 6–3
Runner-up	3.	28 October 2012	Buenos Aires, Argentina	Clay	Diego Schwartzman	1–6, 5–7
Winner	3.	28 July 2013	Oberstaufen, Germany	Clay	Peter Gojowczyk	6–3, 6–4
Runner-up	4.	7 September 2014	Brașov, Romania	Clay	Andreas Haider-Maurer	3–6, 2–6

Rufin serves to Tomáš Berdych at Rod Laver Arena during the 2013 Australian Open

Doubles: 1 (0–1)

Outcome	No.	Date	Tournament	Surface	Partner	Opponents	Score
Runner-up	1.	7 January 2012	Nouméa, New Caledonia	Hard	Axel Michon	Sanchai Ratiwatana Sonchat Ratiwatana	0–6, 4–6

Singles

Current until US Open.

Doubles

Current as far as the 2014 US Open (tennis).