Stefan Heckmanns defeated Kim Warwick 6-3 7-5 in the USA 2 Masters 1 round of 64 on hard.
Heckmanns S. took it in straight sets.
Stefan Heckmanns beat Kim Warwick 6-3 7-5. Umpiry, "Stefan Heckmanns vs Kim Warwick — USA 2 Masters 1 Round of 64", https://umpiry.com/match/1991-04-29/heckmanns-vs-warwick-usa-2-masters-1-r64?utm_source=cite (as of 29 April 1991).