|Residence||San Diego, California, United States|
|Born||9 January 1974|
|Height||5 ft 11 in (180 cm)|
|Highest ranking||No. 173 (20 Oct 1997)|
|Grand Slam Singles results|
|Australian Open||1R (1992, 1993, 1995, 1997)|
|French Open||1R (1996)|
|Wimbledon||1R (1992, 1993)|
|US Open||1R (1994)|
|Highest ranking||No. 165 (15 Aug 1994)|
|Grand Slam Doubles results|
|Australian Open||3R (1992, 1999)|
|Wimbledon||1R (1994, 1995)|
Doyle won four junior Grand Slam titles during his early years. He and partner Joshua Eagle were boys' doubles champions at the 1991 Australian Open. In 1992, he became 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 made eight main draw appearances in singles at Grand Slam level. Although he didn't ever proceed past the first round, he came close when he lost 5–7 in the fifth set to Wayne Black at the 1995 Australian Open and also in another five set loss at the 1996 French Open, to Greg Rusedski, with the same fifth set score.
Every year from 1991 to 1999, Doyle appeared in the men's doubles at the Australian Open. He twice reached the round of 16, with Eagle in 1992 and later partnering Ben Ellwood in the 1999 Australian Open. His run with Ellwood included a win over 12th seeds Donald Johnson and Francisco Montana.
|No.||Year||Tournament||Surface||Partner||Opponents in the final||Score in the final|
|1.||1994||Bochum, Germany||Clay||Michael Tebbutt|| Andrew Florent
|4–6, 7–6, 7–6|
|2.||1994||Cincinnati, United States||Hard||Paul Kilderry|| Brian Gyetko
|3.||1997||Granby, Canada||Hard||Mark Merklein|| Eyal Erlich
|4.||1997||Edinburgh, Great Britain||Clay||Wayne Arthurs|| Chris Haggard
|4–6, 6–2, 6–2|