David Volfson defeated Alex Blumenberg 6-3 6-3 in the Brazil F13 qualifying round of 16 on clay.
Volfson D. took it in straight sets.
David Volfson beat Alex Blumenberg 6-3 6-3. Umpiry, "David Volfson vs Alex Blumenberg — Brazil F13 Qualifying Round of 16", https://umpiry.com/match/2014-11-10/blumenberg-vs-volfson-brazil-f13-q16?utm_source=cite (as of 10 November 2014).