Martin Verkerk defeated Melvyn Op Der Heijde 6-3 6-1 in the Germany F2 round of 32 on clay. The upset overturned the form book — Melvyn Op Der Heijde came in leading the head-to-head 1–0, but Martin Verkerk had been the form player, winning 5 of their last 7 on clay. Martin Verkerk claimed a first win over Melvyn Op Der Heijde in two meetings, levelling the head-to-head at 1–1.
Verkerk M. took it in straight sets.
Martin Verkerk beat Melvyn Op Der Heijde 6-3 6-1. Umpiry, "Martin Verkerk vs Melvyn Op Der Heijde — Germany F2 Round of 32", https://umpiry.com/match/2000-05-01/heijde-vs-verkerk-germany-f2-r32?utm_source=cite (as of 1 May 2000).