Jan Michael Gambill defeated Marcelo Rios 6-3 6-4 in the Hamburg Masters round of 32 on clay. The upset overturned the form book — Marcelo Rios came in leading the head-to-head 3–0, defending last year's semi-final. Jan Michael Gambill claimed a first win over Marcelo Rios in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-10-21 | Stockholm | R16 | hard | Marcelo Rios | 6-2 RET |
| 1999-10-11 | Singapore | QF | hard | Marcelo Rios | 6-4 6-4 |
| 1998-03-09 | Indian Wells Masters | SF | hard | Marcelo Rios | 7-6(3) 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (200 vs 115). ATP, WTA & Challenger.