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.
Jan Hernych Jan Hernych (born 7 July 1979) is a professional male tennis player from Czech Republic. Born in Prague, he turned pro in 1998 and achieved his career-high singles ranking of World No. 59 in April 2009. He won one doubles title and was runner-up in 's-Hertogenbosch in 2006.