Marcelo Pinheiro Davi de Melo (Portuguese pronunciation: [maʁˈsɛlu ˈmɛlu];[1] born September 23, 1983) is a Brazilian professional tennis player who is a doubles specialist.

He is a two-time Grand Slam champion in doubles, having won the 2015 French Open alongside Ivan Dodig and the 2017 Wimbledon Championships with Łukasz Kubot.

He has represented Brazil in the Davis Cup since 2008, often playing doubles alongside André Sá or Bruno Soares, and has also competed at three editions of the Summer Olympic Games.

[3] In 2008, Melo partnered with André Sá and had a good campaign, winning three ATPs together—Costa do Sauípe, Poertschach and New Haven.

They came to play in the Masters Cup, in which the top eight doubles in the world compete, but they ended the year ranked No.

In ATP 500 Hamburg, a tournament that had once been a Masters Series, Melo and his partner, the Slovak Filip Polášek, finished as the runners-up.

At Roland Garros, they defeated the brothers Bob Bryan and Mike Bryan—, the world's top doubles players—, and reached the quarterfinal.

[3] In 2012, playing with Ivan Dodig, Melo was the runner-up at ATP 500 Memphis and reached the quarterfinals of Roland Garros and Wimbledon.

Melo participated in the 2012 Summer Olympics with Bruno Soares; they reached the quarterfinals after defeating the duo Berdych and Stepanek by 24–22 in the last set.

[6][7] In the second half of 2012, Melo was a semifinalist in the Masters 1000 Cincinnati and reached the third round of the US Open playing with Dodig.

In February, Melo defeated the Bryan brothers in the US and partnered with Bruno Soares in the Davis Cup.

Melo won the Acapulco tournament and reached the semifinals of the first three Masters 1000 of the year: Indian Wells, Miami, and Monte Carlo.

In June, he won his maiden doubles Grand Slam of his career, winning Roland Garros alongside Ivan Dodig by defeating The Bryan brothers in the final.

In October, Melo won back-to-back-to-back tournaments, first in Tokyo, followed by the Shanghai Masters (with Raven Klaasen).

In Vienna, playing alongside Łukasz Kubot, Melo guaranteed his place at the top of the ATP doubles ranking by advancing to the semifinal.

[12][13] In October, Melo partnered with Łukasz Kubot and defeated Oliver Marach and Fabrice Martin to win the Vienna Open doubles title.

Eighth-seeded Melo and Kubot reached the BNP Paribas Open semi-finals after breezing past tricky wild card duo Nick Kyrgios and Nenad Zimonjić.

[14] At the 2017 Miami Open Melo and Kubot dropped only three sets en route to the final, defeating Marcus Daniell & Marcelo Demoliner, Jean-Julien Rojer & Horia Tecău, Jamie Murray & Bruno Soares in QF and Daniel Nestor & Brian Baker in SF to reach their second straight ATP Masters 1000 final.

[15] In the final the sixth-seeded Melo & Kubot defeated American duo Nick Monroe and Jack Sock in straight sets.

16 seeds Oliver Marach and Mate Pavić in a final which took 4 hours 39 minutes and five sets to complete.

[22] At the 2022 Rakuten Japan Open Tennis Championships, he won his 10th ATP 500 title and 36th overall partnering Mackenzie McDonald after defeating third seeds Rafael Matos and David Vega Hernández.

[23] He reached 600 career wins at the 2023 French Open partnering John Peers past William Blumberg/Miomir Kecmanovic.

[24] Also partnering with Peers at the 2023 Atlanta Open, he played his 1000th tour-level match with a victory over Luis David Martinez and Reese Stalder owning a 608-392 record.