Head to head
0
Hard
1
1
Clay
0
Hernan Gumy's wins on the left · Michael Chang's on the right · bar lengths share one scale
All meetings (2)
| 2000 | Memphis | Hard | R16 | Michael Chang | 6-2 6-0 |
| 1997 | Rome Masters | Clay | R64 | Hernan Gumy | 6-3 6-2 |
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.