Has František Čermák and Horia Tecău both reached the top ten ranking in tennis doubles?
František Čermák František Čermák (born 14 November 1976) is a Czech professional tennis player. He has won 31 doubles titles on the ATP Tour and has been a finalist 24 times. He achieved a career-high doubles ranking of World No. 14 in February 2010. He usually plays doubles with Filip Polášek. In mixed doubles, Čermák and partner Lucie Hradecká reached the final of the 2013 Australian Open and won the 2013 French Open. In singles, Čermák won 1 Challenger title and 10 Futures titles, reaching a career-high singles ranking of World No. 201 in October 2003.
Prague Open The Prague Open is a tennis tournament held in Prague, the capital of the Czech Republic. The tournament is part of the ATP Challenger Tour since 1996 (with an interruption in the years 2009–10). In years 1992–2010 also hosted the WTA events, since 2011 it is part of the ITF Women's Circuit.