German Lopez defeated Oscar Martinez Dieguez 6-7 6-3 6-4 in the Spain 1 Masters 4 round of 16 on clay. The upset overturned the form book — Oscar Martinez Dieguez came in leading the head-to-head 1–0. German Lopez claimed a first win over Oscar Martinez Dieguez in two meetings, levelling the head-to-head at 1–1.
Lopez G. came through in three sets.
Clay: Lopez G. leads 1–0 · Hard: Martinez Dieguez O. leads 1–0
German Lopez beat Oscar Martinez Dieguez 6-7 6-3 6-4. Umpiry, "German Lopez vs Oscar Martinez Dieguez — Spain 1 Masters 4 Round of 16", https://umpiry.com/match/1997-01-03/dieguez-vs-lopez-spain-1-masters-4-r16?utm_source=cite (as of 3 January 1997).