What profession do both Lucie Šafářová and Sergio Casal share?
Lucie Šafářová: Lucie Šafářová (] ; born 4 February 1987) is a Czech professional tennis player from Brno. Sergio Casal: Sergio Casal Martínez (born 8 September 1962) is a former professional tennis player from Spain.
professional tennis player