2020: ATP debut and maiden Challenger singles and doubles titles

Meligeni made his debut in an ATP Tour singles main draw as wildcard at the 2020 Rio Open, losing in three sets to world No. 4 Dominic Thiem in the first round.

Meligeni won his first ATP Challenger doubles title at Guayaquil alongside Venezuelan Luis David Martínez, defeating Spaniards Sergio Martos Gornés and Jaume Munar in the final.

Meligeni Alves won his first ATP Challenger singles title at São Paulo, defeating Portuguese Frederico Ferreira Silva, on 29 November 2020. He also won his second doubles title alongside Luis David Martínez in the same event.

2021: First ATP title and top 100 debut in doubles

In March 2021, Meligeni Alves won his first ATP 250 doubles title alongside Rafael Matos at the 2021 Córdoba Open defeating Romain Arneodo and Benoît Paire. He reached the top 100 on 14 June 2021 at world No. 99 in doubles.

2022: Top 150 in singles, Major debut & Second ATP title & top 75 in doubles

He made his Grand Slam debut in doubles partnering Rafael Matos at the 2022 Australian Open.

In February 2022, Meligeni Alves won his second ATP 250 doubles title at the 2022 Chile Open alongside Matos.

He reached the top 150 at No. 144 on 18 July 2022 following his second Challenger title at the 2022 Iași Open in Romania and a career-high singles ranking of No. 137 on 25 July 2022.

He finished the year ranked at world No. 149 in singles on 21 November 2022.

2023: Masters and Grand Slam debuts

Ranked No. 164 he qualified for his first Masters 1000 at the 2023 Miami Open.

He made his Grand Slam debut after qualifying at the US Open^[4] and won on his debut his first match defeating lucky loser James Duckworth.^[5]

Doubles: 2 (2 titles)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Feb 2021	Córdoba Open, Argentina	250 Series	Clay	Rafael Matos	Romain Arneodo Benoît Paire	6–4, 6–1
Win	2–0	Feb 2022	Chile Open, Chile	250 Series	Clay	Rafael Matos	André Göransson Nathaniel Lammons	7–6(10–8), 7–6(7–3)

Singles: 11 (6–5)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Win	1–0	May 2018	Egypt F17, Cairo	Futures	Clay	Orlando Luz	7–6(7–3), 7–6(7–3)
Loss	1–1	Oct 2018	Brazil F6, Curitiba	Futures	Clay	Francisco Cerúndolo	6–7(3–7), 2–6
Loss	1–2	Nov 2018	Brazil F7, Sao Carlos	Futures	Clay	João Souza	3–6, 3–6
Win	2–2	Feb 2019	M15 Monastir, Tunisia	Futures	Hard	Evan Hoyt	6–4, 6–3
Win	3–2	Mar 2019	M15 Antalya, Turkey	Futures	Clay	Ivan Nedelko	6–7(5–7), 7–5 Ret.
Win	4–2	Apr 2019	M15 Antalya, Turkey	Futures	Clay	Clement Geens	6–3, 1–0 ret.
Loss	4–3	May 2019	M15 Las Palmas, Spain	Futures	Clay	Eduard Esteve Lobato	2–6, 3–6
Loss	4–4	May 2019	M15 Las Palmas, Spain	Futures	Clay	Eduard Esteve Lobato	4–6, 1–6
Win	5–4	Nov 2020	São Paulo, Brazil	Challenger	Clay	Frederico Ferreira Silva	6–2, 7–6(7–1)
Loss	5–5	Oct 2021	Santiago, Chile	Challenger	Clay	Sebastián Báez	6–3, 6–7(6–8), 1–6
Win	6–5	Jul 2022	Iași, Romania	Challenger	Clay	Pablo Andújar	6–3, 4–6, 6–2

Doubles: 19 (8–11)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Aug 2019	Segovia, Spain	Challenger	Clay	Orlando Luz	Sander Arends David Pel	6–4, 7–6(7–3)
Loss	0–2	Oct 2019	Lima, Peru	Challenger	Clay	Luis David Martínez	Ariel Behar Gonzalo Escobar	6–2, 2–6, [10–3]
Win	1–2	Nov 2020	Guayaquil, Ecuador	Challenger	Clay	Luis David Martínez	Sergio Martos Gornés Jaume Munar	6–0, 4–6, [10–3]
Win	2–2	Nov 2020	São Paulo, Brazil	Challenger	Clay	Luis David Martínez	Rogério Dutra Silva Fernando Romboli	6–3, 6–3
Loss	2–3	Dec 2020	Campinas, Brazil	Challenger	Clay	Luis David Martínez	Sadio Doumbia Fabien Reboul	7–6(7–9), 5–7, [7–10]
Loss	2–4	Mar 2021	Santiago, Chile	Challenger	Clay	Rafael Matos	Luis David Martínez Gonçalo Oliveira	5–7, 1–6
Loss	2–5	May 2021	Biella, Italy	Challenger	Clay	Rafael Matos	André Göransson Nathaniel Lammons	6–7(3–7), 3–6
Win	3–5	Jul 2021	Iași, Romania	Challenger	Clay	Orlando Luz	Hernán Casanova Roberto Ortega Olmedo	6–3, 6–4
Loss	3–6	Jul 2021	Tampere, Finland	Challenger	Clay	Orlando Luz	Pedro Cachin Facundo Mena	5–7, 3–6
Win	4–6	Jul 2021	Trieste, Italy	Challenger	Clay	Orlando Luz	Antoine Hoang Albano Olivetti	7–5, 6–7(6–8), [10–5]
Win	5–6	Aug 2021	Como, Italy	Challenger	Clay	Rafael Matos	Luis David Martínez Andrea Vavassori	6–7(2–7), 6–4, [10–6]
Loss	5–7	Sep 2021	Tulln an der Donau, Austria	Challenger	Clay	Rafael Matos	Dustin Brown Andrea Vavassori	6–7(5–7), 1–6
Win	6–7	Nov 2021	Montevideo, Uruguay	Challenger	Clay	Rafael Matos	Ignacio Carou Luciano Darderi	6–4, 6–4
Win	7–7	Nov 2021	Campinas, Brazil	Challenger	Clay	Rafael Matos	Gilbert Klier Júnior Matheus Pucinelli de Almeida	6–3, 6–1
Loss	7–8	Nov 2021	São Paulo, Brazil	Challenger	Clay	Rafael Matos	Nicolás Barrientos Alejandro Gómez	w/o
Loss	7–9	Apr 2022	San Luis Potosí, Mexico	Challenger	Clay	Luis David Martínez	Nicolás Barrientos Miguel Ángel Reyes-Varela	6–7(11–13), 2–6
Win	8–9	Apr 2022	Tigre, Argentina	Challenger	Clay	Guillermo Durán	Luciano Darderi Juan Bautista Torres	3–6, 6–4, [10–3]
Loss	8–10	May 2022	Salvador, Brazil	Challenger	Clay	Orlando Luz	Diego Hidalgo Cristian Rodríguez	5–7, 1–6
Loss	8–11	Nov 2022	São Leopoldo, Brazil	Challenger	Clay	João Lucas Reis da Silva	Guido Andreozzi Guillermo Durán	1–5 ret.

Davis Cup

Meligeni Alves was first nominated to play for Brazil in Davis Cup in September 2021 against Lebanon.^[10] Meligeni Alves made his debut in Davis Cup against Hady Habib and won in straight sets in the second rubber which after allowed the Brazilian team to confirm the 4–0 tie and advance into the 2022 Davis Cup qualifying round.^[11] Currently, Meligeni Alves sports a 3–2 record in Davis Cup matches.

All Davis Cup Matches: 1–0 (Singles: 1–0)
2020 Davis Cup World Group I
Round	Date	Opponent	Final match score	Location	Surface	Match	Opponent	Rubber Score
WGI	September 18–19, 2021	Lebanon	2–0	Jounieh	Clay	Singles 4	Hady Habib	6–1, 6–3

United Cup

He represented Brazil at the 2023 United Cup as the No. 2 player.

Doubles: 1 (1 title)

Result	Year	Tournament	Surface	Partner	Opponents	Score
Winner	2016	US Open	Hard	Juan Carlos Aguilar	Félix Auger-Aliassime Benjamin Sigouin	6–3, 7–6(7–4)