Roger Federer defeated Yves Allegro 7-5 6-2 in the Switzerland 2 Masters 1 semi-final on carpet. The upset overturned the form book — Yves Allegro came in leading the head-to-head 1–0. Roger Federer claimed a first win over Yves Allegro in two meetings, levelling the head-to-head at 1–1.
Federer R. took it in straight sets.
Carpet: Federer R. leads 1–0 · Clay: Allegro Y. leads 1–0
Roger Federer beat Yves Allegro 7-5 6-2. Umpiry, "Roger Federer vs Yves Allegro — Switzerland 2 Masters 1 Semi-final", https://umpiry.com/match/1998-10-17/allegro-vs-federer-switzerland-2-masters-1-sf?utm_source=cite (as of 17 October 1998).