Diego Sebastián Schwartzman (Spanish pronunciation: [ˈdjeɣo seβasˈtjan ˈʃwaɾtsman],[4][5] German: [ˈʃvaʁtsman]; born 16 August 1992) is an Argentine professional tennis player.

3 Dominic Thiem to reach his first major semifinal, the shortest man to do so since the 5-foot-6-inch (168 cm) American Harold Solomon at the 1980 French Open.

On the ATP Tour, he has endured less antisemitism, but at the 2017 US Open, a spectator shouted, "Jewish people are not allowed here" in the direction of Schwartzman.

[29] Schwartzman made his first appearance in the main draw of a Grand Slam event at the French Open; he came through qualifying before making it to the second round, where he lost to Roger Federer.

In the Challenger Tour Finals, he won over João Souza, Simone Bolelli, and Guilherme Clezar to claim the title.

[27] Schwartzman's best result of the season came at the Istanbul Open, where he reached the semifinals, beating former top-ten player Jürgen Melzer along the way.

At Wimbledon, Schwartzman scored his first career grass-court win by defeating Mirza Bašić in straight sets before falling in the second round to Jiří Veselý.

[33] At the Australian Open, Schwartzman defeated Rudolf Molleker in four sets and American Denis Kudla in a five-set thriller.

At the 2019 Mutua Madrid Open as an unseeded pair, Schwartzman reached his first Masters 1000 final in doubles partnering Dominic Thiem, where they lost to Jean-Julien Rojer and Horia Tecău.

[47] Career-wise, he was fourth among active players in return games won (31.1%), behind only Nadal (33.5%), Djokovic (32%), and Andy Murray (31.7%).

[46] At the Australian Open, Schwartzman reached the fourth round without dropping a set but was defeated by the eventual champion, Novak Djokovic.

[48] He was seeded ninth in the men's singles draw at the US Open but lost in a first-round five-setter to the unseeded British player Cameron Norrie.

[61] At the Paris Masters, Schwartzman beat Richard Gasquet and Alejandro Davidovich Fokina before losing to Daniil Medvedev in the quarterfinals.

[62] Schwartzman reached the third round of the Australian Open but was defeated by qualifier Aslan Karatsev in a rare matchup between two Jewish tennis players.

[64] Seeded 10th at the 2021 French Open, Schwartzman reached the quarterfinals without dropping a set but was defeated by Rafael Nadal in a thrilling four-set match.

He easily defeated Juan Pablo Varillas and Tomáš Macháč but lost in 3 sets in an upset to Karen Khachanov.

[66] At the 2021 US Open, Schwartzman reached the fourth round defeating Ričardas Berankis, Kevin Anderson, and Alex Molčan without dropping a set.

[67] At 2021 Indian Wells, Schwartzman reached the quarterfinals, beating Maxime Cressy, Dan Evans and Casper Ruud before being defeated by Cameron Norrie in straight sets.

He continued his success in the fall swing of the season by reaching the quarterfinals at the 2021 Erste Bank Open with wins over Fabio Fognini and Gaël Monfils.

[70] Schwartzman saw early success in the season during the Golden Swing, a series of four tennis tournaments in South America.

Entering the 2022 Córdoba Open as the top seed, Schwartzman was favored to win the tournament held in his home country.

Schwartzman defeated Juan Pablo Ficovich and Daniel Elahi Galán to reach the semifinals, where he lost to Alejandro Tabilo.

[71] The following week Schwartzman entered the Argentina Open as the tournament's defending champion and defeated Jaume Munar, Francisco Cerúndolo and Lorenzo Sonego to reach the final.

[73] The next week, Schwartzman continued his success in South America by reaching the final at the Rio Open an ATP 500 tournament.

[75] Schwartzman continued his winning ways during the European clay swing of the season by reaching the quarterfinals of the 2022 Barcelona Open, an ATP 500 event, where he defeated world No.

[76] At the 2022 Italian Open, Schwartzman partnered with John Isner as an unseeded pair and defeated Andrey Golubev and Máximo González in the semifinal.

The following week, at the Cincinnati Open, he defeated Alex Molčan and Aslan Karatsev before falling to Stefanos Tsitsipas in the third round.

At the 2023 Rolex Shanghai Masters he reached the fourth round defeating seventh seed Taylor Fritz winning three matches in a row for the first time in the season and since Roland Garros in May 2022.

[85] His good form continued at the 2023 Japan Open Tennis Championships where he recorded his 250th career win over compatriot Francisco Cerúndolo.

[citation needed] Schwartzman's speed and powerful baseline game have resulted in most of his success coming on clay rather than hard courts or grass.