Andrei Chesnokov defeated Michael Stich 2-6 7-6 6-4 in the Toulouse round of 32 on hard. The upset overturned the form book — Michael Stich came in leading the head-to-head 1–0. Andrei Chesnokov claimed a first win over Michael Stich in two meetings, levelling the head-to-head at 1–1.
Chesnokov A. came through in three sets.
Andrei Chesnokov beat Michael Stich 2-6 7-6 6-4. Umpiry, "Andrei Chesnokov vs Michael Stich — Toulouse Round of 32", https://umpiry.com/match/1990-10-01/chesnokov-vs-stich-toulouse-r32?utm_source=cite (as of 1 October 1990).