| Steve Herdoiza | |
| Fullname: | Stephen M. Herdoiza |
| Birth Date: | 21 July 1969 |
| Birth Place: | Bloomfield Hills, Michigan |
| Plays: | Right-handed |
| Careerprizemoney: | $25,019 |
| Singlesrecord: | 0–1 |
| Highestsinglesranking: | No. 281 (Aug 28, 1995) |
| Australianopenresult: | Q2 (1995) |
| Usopenresult: | Q2 (1995) |
| Highestdoublesranking: | No. 316 (Aug 1 1994) |
Stephen Herdoiza (born July 21, 1969) is an American former professional tennis player.
A native of Bloomfield Hills, Michigan, Herdoiza played collegiate tennis for Northwestern University from 1988 to 1991, earning All-Big 10 selection all four years. He won the Big 10 singles title in 1989, then in 1990 reached the quarter-finals of the NCAA championships and was named an All-American. In 1990 he was also a member of Northwestern's Big Ten championship winning team, playing beside future world number four Todd Martin.[1]
Herdoiza, who reached a best singles world ranking of 281, made his only ATP Tour main draw appearance as a qualifier at the 1995 Canadian Open, where he was beaten in the first round by Mark Philippoussis.[2]