Patrick Erhardt defeated Yasufumi Yamamoto 7-6 4-6 6-2 in the India Masters 4 round of 32 on clay. The upset overturned the form book — Yasufumi Yamamoto came in leading the head-to-head 1–0. Patrick Erhardt claimed a first win over Yasufumi Yamamoto in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-11-17 | Japan 2 Masters 3 | QF | hard | Yasufumi Yamamoto | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.