Michael Chang defeated Jens Knippschild 6-3 6-7 7-6 in the Stuttgart Masters round of 64 on carpet. The upset overturned the form book — Jens Knippschild came in leading the head-to-head 1–0. Michael Chang claimed a first win over Jens Knippschild in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-04-12 | Tokyo | R32 | hard | Jens Knippschild | 6-3 6-4 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (140 vs 41). ATP, WTA & Challenger.