Goran Ivanisevic defeated Jan Siemerink 6-3 0-6 7-6 in the London round of 32 on carpet. The upset overturned the form book — Jan Siemerink came in leading the head-to-head 4–2, defending last year's semi-final. Goran Ivanisevic narrowed the head-to-head to 4–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-22 | Wimbledon | QF | grass | Goran Ivanisevic | 7-6(10) 7-6(5) 7-6(6) |
| 1998-03-02 | Rotterdam | R32 | hard | Jan Siemerink | 5-7 7-6(6) 6-3 |
| 1998-02-16 | Antwerp | R32 | hard | Jan Siemerink | 6-4 6-3 |
| 1998-01-19 | Australian Open | R128 | hard | Jan Siemerink | 6-2 7-6(3) 3-6 6-4 |
| 1997-10-13 | Ostrava | R32 | carpet | Goran Ivanisevic | 5-7 6-3 6-3 |
| 1997-08-04 | Cincinnati Masters | R16 | hard | Jan Siemerink | 6-4 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 (154 vs 91). ATP, WTA & Challenger.