Has František Čermák and Horia Tecău both reached the top ten ranking in tennis doubles?
Horia Tecău Horia Tecău (] ; born January 19, 1985) is a Romanian tennis player currently ranked World No. 9 in doubles. He turned pro in 2003 and reached the men's doubles finals of the 2010, 2011 and 2012 Wimbledon Championships with Robert Lindstedt before winning it in 2015 with Jean-Julien Rojer, with whom he also won the 2017 US Open. Tecău also won the 2012 Australian Open mixed doubles title with Bethanie Mattek-Sands and the 2015 ATP World Tour Finals with Rojer.
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.