Oscar Serrano defeated German Puentes 6-3 7-6 in the Spain 1 Masters 4 round of 16 on clay. The upset overturned the form book — German Puentes came in leading the head-to-head 5–3, but Oscar Serrano had been the form player, winning 4 of their last 9 on clay. Oscar Serrano narrowed the head-to-head to 5–4.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-02-07 | Spain F2 | R16 | clay | German Puentes | 7-6(3) 6-2 |
| 2004-10-25 | Spain F29 | SF | clay | German Puentes | 6-1 6-3 |
| 2000-02-04 | Spain 2 Masters 4 | QF | clay | German Puentes | 7-6(3) 6-3 |
| 2000-01-10 | Spain 1 3 | F | clay | German Puentes | 4-6 7-5 6-2 |
| 2000-01-10 | Spain 1 1 | SF | clay | Oscar Serrano | 6-1 5-7 6-1 |
| 1998-02-27 | Spain 3 Masters 2 | QF | clay | Oscar Serrano | 6-2 6-3 |
| 1998-01-30 | Spain 2 Masters 1 | SF | clay | German Puentes | 7-6 7-5 |
| 1998-01-03 | Spain 1 Masters 1 | R32 | clay | Oscar Serrano | 6-4 6-3 |
Averages over each player's completed matches in the selected window (18 vs 34). 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