Alexander Volkov defeated Jim Grabb 7-6 4-6 6-3 in the Moscow quarter-final on hard. The result followed the form book — Alexander Volkov came in defending last year's round of 32.
Volkov A. came through in three sets.
Alexander Volkov beat Jim Grabb 7-6(1) 4-6 6-3. Umpiry, "Alexander Volkov vs Jim Grabb — Moscow Quarter-final", https://umpiry.com/match/1991-11-04/grabb-vs-volkov-moscow-qf?utm_source=cite (as of 4 November 1991).