Oscar Martinez Dieguez defeated Albert Montanes 6-4 4-6 6-4 in the Spain F2 qualifying round on clay. The upset overturned the form book — Albert Montanes came in leading the head-to-head 1–0. Oscar Martinez Dieguez claimed a first win over Albert Montanes in two meetings, levelling the head-to-head at 1–1.
Martinez Dieguez O. came through in three sets.
Oscar Martinez Dieguez beat Albert Montanes 6-4 4-6 6-4. Umpiry, "Oscar Martinez Dieguez vs Albert Montanes — Spain F2 Qualifying Round", https://umpiry.com/match/1999-07-12/dieguez-vs-montanes-spain-f2-qf?utm_source=cite (as of 12 July 1999).