Grant Doyle (born 9 January 1974) is a former professional tennis player from Australia.

Doyle won four junior Grand Slam titles during his early years. He and partner Joshua Eagle were boy's doubles champions at the 1991 Australian Open. For part of 1992 he was the number one ranked junior in the world. With new partner Brad Sceney, Doyle won the doubles again in the 1992 Australian Open and was also the singles champion, dropping just two games in his defeat of Brian Dunn in the final. He was a doubles winner at the 1992 French Open, partnering Mexican Enrique Abaroa and won the singles title in that year's Queen's Junior Championships.

Doyle was a doubles semi-finalist in the 1993 Australian Men's Hardcourt Championships, held in Adelaide, with Eagle as his partner. He never made it into a final on the ATP Tour. As a singles player he had his best result at the 1997 Sybase Open in San Jose, California, making the quarter-finals, with wins over Brian MacPhie and Jeff Tarango.

The Australian failed to register a win in any his eight singles appearances at Grand Slam level. The closest he came was in the 1995 Australian Open when he lost 5-7 to Wayne Black in the fifth set and also at the 1996 French Open, where Greg Rusedski beat him with the same fifth set score.

Fritz Wolmarans (born 7 March 1986) is a South African tennis player playing on the ATP Challenger Tour. He has also played for the South Africa Davis Cup team.

On May 5, 2011, Wolmarans reached his highest ATP singles ranking of 198 whilst his highest doubles ranking was 413 achieved on September 20, 2010.