Head to head
Rivalry summary
Alex O'Brien and Brad Gilbert met 2 times on the ATP tour between 1993 and 1994. Their head-to-head is level at 1–1. By surface, they are level 1–1 on hard.
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Hard
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Alex O'Brien's wins on the left · Brad Gilbert's on the right · bar lengths share one scale
All meetings (2)
| 1994 | Cincinnati Masters | Hard | R32 | Alex O'Brien | 6-4 6-1 |
| 1993 | Scottsdale | Hard | R16 | Brad Gilbert | 1-6 7-5 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.