Oliver Gross defeated Carlos Costa 6-3 6-1 in the Hamburg Masters round of 32 on clay. The upset overturned the form book — Carlos Costa came in leading the head-to-head 3–0, but Oliver Gross had been the form player, winning 2 of their last 5 on clay. Oliver Gross claimed a first win over Carlos Costa in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-08 | Bologna | R16 | clay | Carlos Costa | 6-2 6-2 |
| 1995-04-10 | Barcelona | R16 | clay | Carlos Costa | 6-3 7-6(2) |
| 1994-08-08 | San Marino | F | clay | Carlos Costa | 6-1 6-3 |
Averages over each player's completed matches in the selected window (67 vs 98). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About