Alex Blumenberg defeated Vicente Bronstein 6-2 6-3 in the Ecuador F1 round of 16 on clay.
Blumenberg A. took it in straight sets.
Alex Blumenberg beat Vicente Bronstein 6-2 6-3. Umpiry, "Alex Blumenberg vs Vicente Bronstein — Ecuador F1 Round of 16", https://umpiry.com/match/2013-08-12/blumenberg-vs-bronstein-ecuador-f1-r16?utm_source=cite (as of 12 August 2013).