Horst Skoff defeated Thomas Muster 6-2 7-6 in the Vienna semi-final on hard. The result followed the form book — Horst Skoff came in leading the head-to-head 1–0. Horst Skoff extended the head-to-head to 2–0.
Skoff H. took it in straight sets.
Horst Skoff beat Thomas Muster 6-2 7-6. Umpiry, "Horst Skoff vs Thomas Muster — Vienna Semi-final", https://umpiry.com/match/1990-10-15/muster-vs-skoff-vienna-sf?utm_source=cite (as of 15 October 1990).