Jan Siemerink defeated Jonas Bjorkman 7-6 5-7 2-6 6-4 7-5 in the Wimbledon round of 32 on grass. The upset overturned the form book — Jonas Bjorkman came in leading the head-to-head 3–0, defending last year's round of 128. Jan Siemerink claimed a first win over Jonas Bjorkman in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-08-31 | US Open | R16 | hard | Jonas Bjorkman | 6-4 2-6 6-2 6-2 |
| 1997-11-03 | Stockholm | F | hard | Jonas Bjorkman | 3-6 7-6(2) 6-2 6-4 |
| 1997-10-20 | Stuttgart Masters | R32 | carpet | Jonas Bjorkman | 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 (153 vs 200). ATP, WTA & Challenger.