Diego Schwartzman. Diego Sebastián Schwartzman ( Spanish pronunciation: [ˈdjeɣo seβasˈtjan ˈʃwaɾdzman], German: [ˈʃvaʁtsman]; born 16 August 1992) is an Argentine professional tennis player competing on the ATP Tour. He has won two ATP singles titles, and reached his career-high singles ranking of world No. 11 on 11 June 2018.

