Daniil Ostapenkov

Daniil Ostapenkov (born May 8, 2003) is a Belarusian professional tennis player. He was ranked as high as No. 48 in the ITF junior rankings.

Ostapenkov is best known for his shocking upset win, in straight sets, over world No. 15 and former world No. 8 Diego Schwartzman during a Davis Cup match against Argentina. At the time, Ostapenkov did not have an ATP ranking.