Juan Antonio Marin defeated Hernan Gumy 5-7 6-2 6-4 in the Umag round of 32 on clay. The result followed the form book — Juan Antonio Marin came in leading the head-to-head 2–1, defending last year's round of 16. Juan Antonio Marin extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-08-09 | San Marino | QF | clay | Juan Antonio Marin | 4-6 6-3 6-2 |
| 1998-08-31 | US Open | R128 | hard | Hernan Gumy | 6-3 0-6 4-6 6-2 6-1 |
| 1998-06-08 | Bologna | R16 | clay | Juan Antonio Marin | 6-4 6-2 |
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 (82 vs 30). ATP, WTA & Challenger.