Guillermo Perez Roldan defeated Marcelo Filippini 1-6 6-2 6-4 in the San Marino semi-final on clay. The result followed the form book — Guillermo Perez Roldan came in leading the head-to-head 2–0. Guillermo Perez Roldan extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-09-09 | Geneva | R32 | clay | Guillermo Perez Roldan | 7-6(1) 6-3 |
| 1991-04-08 | Barcelona | R16 | clay | Guillermo Perez Roldan | 6-1 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.