Head to head
1
Hard
1
1
Carpet
0
Alex O'Brien's wins on the left · Byron Black's on the right · bar lengths share one scale
All meetings (3)
| 1997 | Indian Wells Masters | Hard | R32 | Byron Black | 3-6 6-1 7-6(3) |
| 1996 | Canada Masters | Hard | R32 | Alex O'Brien | 7-6(2) 6-2 |
| 1994 | Philadelphia | Carpet | R32 | Alex O'Brien | 7-5 7-6(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.