Which tennis player played in the Masters, Daniel Vacek or Yan Zi?
Daniel Vacek: Daniel Vacek (born 1 April 1971) is a former tennis player from Czechoslovakia and the Czech Republic who turned professional in 1990. Daniel Vacek:  He reached the quarterfinals of the 1995 Paris Masters, the 1998 Canada Masters and the 1998 Cincinnati Masters, and achieved a career-high singles ranking of World No. 26 in January 1996. Yan Zi (tennis): Yan Zi (; ; born November 12, 1984), is a retired Chinese-born Hong Kong female professional tennis player.
Daniel Vacek