Head to head
Rivalry summary
Gustavo Kuerten and Alex O'Brien met 2 times on the ATP tour between 1998 and 1998. 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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Gustavo Kuerten's wins on the left · Alex O'Brien's on the right · bar lengths share one scale
All meetings (2)
| 1998 | New Haven | Hard | R32 | Gustavo Kuerten | 6-3 6-2 |
| 1998 | Canada Masters | Hard | R64 | Alex O'Brien | 6-3 7-6(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.