His best year on tour was 1989 when he won five singles titles, and claimed wins over four future Hall of Famers – Pete Sampras, Michael Chang ... He has also coached Sam Querrey and Kei Nishikori.

Michael Chang was a professional tennis player who played from 1988-2003. He played singles at the 1992 and 2000 Olympics. Chang was best known as a professional for winning the 1989 French Open when ...