Oscar Martinez Dieguez defeated Carlos Martinez Comet 6-3 6-3 in the Spain 5 Masters 3 qualifying round on clay. The upset overturned the form book — Carlos Martinez Comet came in leading the head-to-head 2–0, but Oscar Martinez Dieguez had been the form player, winning 5 of their last 9 on clay. Oscar Martinez Dieguez claimed a first win over Carlos Martinez Comet in three meetings, narrowing the head-to-head to 2–1.
Martinez Dieguez O. took it in straight sets.
Oscar Martinez Dieguez beat Carlos Martinez Comet 6-3 6-3. Umpiry, "Oscar Martinez Dieguez vs Carlos Martinez Comet — Spain 5 Masters 3 Qualifying Round", https://umpiry.com/match/1999-05-07/comet-vs-dieguez-spain-5-masters-3-qf?utm_source=cite (as of 7 May 1999).