Are both Tom Okker and Kim Clijsters Belgian tennis players?
Tom Okker Thomas Samuel Okker (born 22 February 1944) is a former Dutch tennis player. He was ranked among the world's top 10 singles players for seven consecutive years, 1968–74, reaching a career high of World No. 3 in 1969. He also was ranked World No. 1 in doubles in 1969.
Boy Westerhof Boy Westerhof (born 25 October 1985) is a Dutch professional tennis player and competes mainly on the ATP Challenger Tour and ITF Futures, both in singles and doubles.