[PAR] [TLE] Diego Schwartzman [SEP] Diego Sebastián Schwartzman (] , ] ; born 16 August 1992) is an Argentine professional tennis player competing mainly on the ATP Tour.  He has won one ATP singles title, and reached a career-high singles ranking of world No. 28 in 2017.  He is a clay court specialist, and is noted for his "deadly" return game. [PAR] [TLE] 2015 ATP Challenger Tour Finals – Singles [SEP] Diego Schwartzman was the defending champion, but did not qualify this year. <br>
[PAR] [TLE] Diego Schwartzman [ SEP ] Diego Sebastián Schwartzman ( ] , ] ; born 16 August 1992 ) is an Argentine professional tennis player competing mainly on the ATP Tour . He has won one ATP singles title , and reached a career - high singles ranking of world No . 28 in 2017 . He is a clay court specialist , and is noted for his " deadly " return game . [PAR] [TLE] 2015 ATP Challenger Tour Finals – Singles [ SEP ] Diego Schwartzman was the defending champion , but did not qualify this year . < br >
Diego Schwartzmann won the annual finals tournament in 2014, but failed to qualify to defend it in 2015, at which sport?
Diego Schwartzmann won the annual finals tournament in 2014 , but failed to qualify to defend it in 2015 , at which sport ?
tennis
tennis