Roberto Menendez defeated Oscar Martinez Dieguez 6-4 5-7 6-1 in the Spain 4 1 round of 16 on clay. The upset overturned the form book — Oscar Martinez Dieguez came in leading the head-to-head 1–0. Roberto Menendez claimed a first win over Oscar Martinez Dieguez in two meetings, levelling the head-to-head at 1–1.
Menendez R. came through in three sets.
Roberto Menendez beat Oscar Martinez Dieguez 6-4 5-7 6-1. Umpiry, "Roberto Menendez vs Oscar Martinez Dieguez — Spain 4 1 Round of 16", https://umpiry.com/match/2000-04-07/dieguez-vs-menendez-spain-4-1-r16?utm_source=cite (as of 7 April 2000).