David Marrero defeated Oscar Serrano 6-4 6-3 in the Spain F1 round of 16 on clay. The upset overturned the form book — Oscar Serrano came in leading the head-to-head 1–0. David Marrero claimed a first win over Oscar Serrano in two meetings, levelling the head-to-head at 1–1.
Marrero D. took it in straight sets.
David Marrero beat Oscar Serrano 6-4 6-3. Umpiry, "David Marrero vs Oscar Serrano — Spain F1 Round of 16", https://umpiry.com/match/2005-01-31/marrero-vs-serrano-spain-f1-r16?utm_source=cite (as of 31 January 2005).