Question: Are Radek Štěpánek and Heather Watson both Grand Slam doubles champions?
Sentence (from "Radek Štěpánek"): Štěpánek's biggest achievements are reaching two Masters 1000 event finals and the quarterfinals of Wimbledon in 2006, as well as winning the deciding match for Czech Republic's Davis Cup winning team in 2012 and again in 2013.
Relevant evidence: No