Robert Witz defeated Mario Pacheco 6-2 6-0 in the Cuba Mexico Masters 2 round of 32 on hard. The upset overturned the form book — Mario Pacheco came in leading the head-to-head 1–0. Robert Witz claimed a first win over Mario Pacheco in two meetings, levelling the head-to-head at 1–1.
Witz R. took it in straight sets.
Robert Witz beat Mario Pacheco 6-2 6-0. Umpiry, "Robert Witz vs Mario Pacheco — Cuba Mexico Masters 2 Round of 32", https://umpiry.com/match/1994-08-06/pacheco-vs-witz-cuba-mexico-masters-2-r32?utm_source=cite (as of 6 August 1994).