Albert Portas defeated Felix Mantilla 6-2 6-4 in the Stuttgart Outdoor quarter-final on clay. The upset overturned the form book — Felix Mantilla came in leading the head-to-head 6–4. Albert Portas narrowed the head-to-head to 6–5.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-08-09 | Sopot | R16 | clay | Felix Mantilla | 5-7 7-5 7-5 |
| 2003-02-17 | Buenos Aires | R32 | clay | Felix Mantilla | 6-3 6-1 |
| 2001-09-24 | Palermo | SF | clay | Felix Mantilla | 2-6 7-6 6-3 |
| 1999-07-26 | Umag | R16 | clay | Albert Portas | 6-4 6-4 |
| 1996-11-04 | Santiago | R32 | clay | Felix Mantilla | 6-4 4-6 6-0 |
| 1996-09-30 | Marbella | R32 | clay | Felix Mantilla | 6-3 7-5 |
| 1995-02-03 | Spain 2 Masters 2 | F | clay | Albert Portas | 7-6 6-4 |
| 1993-05-14 | Spain 4 Masters 1 | QF | clay | Felix Mantilla | 6-1 6-2 |
| 1993-03-05 | Spain 2 Masters 1 | R16 | clay | Albert Portas | 7-5 6-2 |
| 1993-02-05 | Spain 1 Masters 1 | R16 | clay | Albert Portas | 6-3 7-6 |
Averages over each player's completed matches in the selected window (200 vs 200). 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