Otto Virtanen (born 21 June 2001) is a Finnish tennis player.
Virtanen has a career high ATP singles ranking of 834 achieved on 3 December 2018.
He also has a career high ATP doubles ranking of 642 achieved on 3 December 2018.
Virtanen won the Boys' Doubles title in the Wimbledon Championships in 2018.
In December 2018 Virtanen won singles tournament in Orange Bowl.