Lars Jonsson defeated Thomas Muster 7-5 6-4 in the Munich round of 32 on clay. The upset overturned the form book — Thomas Muster came in leading the head-to-head 1–0, defending last year's round of 32, but Lars Jonsson had been the form player, winning 5 of their last 7 on clay. Lars Jonsson claimed a first win over Thomas Muster in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1990-05-28 | Roland Garros | R128 | clay | Thomas Muster | 7-5 6-3 6-2 |
Averages over each player's completed matches in the selected window (9 vs 133). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About