Are both Tom Okker and Kim Clijsters Belgian tennis players?
Kim Clijsters Kim Antonie Lode Clijsters (] ; born 8 June 1983) is a Belgian former professional tennis player. Clijsters is a former world No. 1 in both singles and doubles.
Martijn van Haasteren Martijn van Haasteren (born 12 September 1980) is a Dutch former professional tennis player who competed for both the Netherlands and the Netherlands Antilles