Nicolas Pastor defeated Facundo Arguello 4-6 7-6 6-3 in the Paraguay F1 round of 32 on clay. The upset overturned the form book — Facundo Arguello came in leading the head-to-head 2–1, but Nicolas Pastor had been the form player, winning 7 of their last 10 on clay. That levelled the head-to-head at 2–2.
Pastor N. came through in three sets.
Nicolas Pastor beat Facundo Arguello 4-6 7-6(4) 6-3. Umpiry, "Nicolas Pastor vs Facundo Arguello — Paraguay F1 Round of 32", https://umpiry.com/match/2011-05-16/arguello-vs-pastor-paraguay-f1-r32?utm_source=cite (as of 16 May 2011).