Nicolas Massu defeated Mark Merklein 6-2 6-1 6-2 in the BAH vs CHI round robin on hard. The upset overturned the form book — Mark Merklein came in leading the head-to-head 1–0. Nicolas Massu claimed a first win over Mark Merklein in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1996-07-19 | USA 4 Masters 3 | QF | hard | Mark Merklein | 6-4 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.