Which tennis player won numerous doubles titles, Rika Hiraki or František Čermák?
Rika Hiraki: Rika Hiraki (Japanese: 平木 理化 , born 6 December 1971) is a former professional Japanese female tennis player. František Čermák: František Čermák (born 14 November 1976) is a Czech professional tennis player. František Čermák:  He has won 31 doubles titles on the ATP Tour and has been a finalist 24 times.
František Čermák