Head to head
0
Hard
3
1
Clay
0
Jan-Michael Gambill's wins on the left · Marcelo Rios's on the right · bar lengths share one scale
All meetings (4)
| 2002 | Stockholm | Hard | R16 | Marcelo Rios | 6-2 RET |
| 2001 | Hamburg Masters | Clay | R32 | Jan-Michael Gambill | 6-3 6-4 |
| 1999 | Singapore | Hard | QF | Marcelo Rios | 6-4 6-4 |
| 1998 | Indian Wells Masters | Hard | SF | Marcelo Rios | 7-6(3) 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.