Martin Engel defeated Wolfgang Winkler 1-6 6-1 6-1 in the USA 4 Masters 4 round of 64 on hard.
Engel M. came through in three sets.
Martin Engel beat Wolfgang Winkler 1-6 6-1 6-1. Umpiry, "Martin Engel vs Wolfgang Winkler — USA 4 Masters 4 Round of 64", https://umpiry.com/match/1997-07-18/engel-vs-winkler-usa-4-masters-4-r64?utm_source=cite (as of 18 July 1997).