Head to head
1
Hard
0
1
Clay
0
1
Grass
0
1
Carpet
0
Michael Chang's wins on the left · Ronald Agenor's on the right · bar lengths share one scale
All meetings (4)
| 1993 | Jakarta | Hard | R32 | Michael Chang | 6-2 6-4 |
| 1991 | Birmingham | Carpet | QF | Michael Chang | 4-2 RET |
| 1989 | Wimbledon | Grass | R64 | Michael Chang | 4-6 6-2 6-1 7-5 |
| 1989 | Roland Garros | Clay | QF | Michael Chang | 6-4 2-6 6-4 7-6 |
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.