Siim Troost

Siim Troost (born 7 December 1999) is an Estonian tennis player.

Troost has a career high ATP singles ranking of 1578, achieved on 23 August 2021. He also has a career high doubles ranking of 1379, achieved on 13 September 2021. Troost has won 1 ITF doubles title.

Troost represents Estonia at the Davis Cup, where he has a W/L record of 0–1.

Troost currently plays college tennis at Vanderbilt University. He previously played for the University of Minnesota. While at Vanderbilt University, Troost played primarily in the 6 singles position. He dominated the SEC.