Armando Brunold defeated Yves Allegro 6-3 6-2 in the Switzerland 1 Masters 1 round of 32 on clay. The upset overturned the form book — Yves Allegro came in leading the head-to-head 2–0. Armando Brunold claimed a first win over Yves Allegro in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-10-17 | Switzerland 2 Masters 3 | R16 | carpet | Yves Allegro | 5-7 6-3 7-6 |
| 1997-10-18 | Switzerland 2 Masters 2 | R32 | carpet | Yves Allegro | 4-6 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.