Head to head
1
Hard
2
1
Clay
0
Michael Chang's wins on the left · Jan Siemerink's on the right · bar lengths share one scale
All meetings (4)
| 1999 | Indian Wells Masters | Hard | R64 | Jan Siemerink | 7-5 6-3 |
| 1995 | Miami Masters | Hard | R32 | Jan Siemerink | 6-4 3-6 6-2 |
| 1992 | Hong Kong | Hard | QF | Michael Chang | 6-3 6-2 |
| 1991 | Roland Garros | Clay | R128 | Michael Chang | 6-2 6-0 6-3 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.