Andrei Cherkasov defeated Gilbert Schaller 4-6 6-4 6-4 in the Doha round of 32 on hard.
Cherkasov A. came through in three sets.
Andrei Cherkasov beat Gilbert Schaller 4-6 6-4 6-4. Umpiry, "Andrei Cherkasov vs Gilbert Schaller — Doha Round of 32", https://umpiry.com/match/1993-01-04/cherkasov-vs-schaller-doha-r32?utm_source=cite (as of 4 January 1993).