Richard Krajicek won his only Grand Slam at Wimbledon in 1996, while Thomas Muster won his lone major at the 1995 French Open. Both are correctly classified as 'one-slam wonders.' Patrick Rafter won 2 US Opens (1997, 1998) and Yevgeny Kafelnikov won 2 majors (1996 French Open, 1999 Australian Open), so they are not one-slam players.