Miguel Merz defeated Sebastien Lareau 7-6 6-3 in the Canada Masters 2 round of 32 on clay. The upset overturned the form book — Sebastien Lareau came in leading the head-to-head 2–0. Miguel Merz claimed a first win over Sebastien Lareau in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-08 | Canada Masters 1 | QF | clay | Sebastien Lareau | 6-2 6-2 |
| 1991-06-08 | Canada Masters 4 | SF | clay | Sebastien Lareau | 6-4 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.