David Volfson defeated Alex Blumenberg 6-4 6-4 in the USA F22 round of 32 on clay. The result followed the form book — David Volfson came in leading the head-to-head 1–0. David Volfson extended the head-to-head to 2–0.
Volfson D. took it in straight sets.
David Volfson beat Alex Blumenberg 6-4 6-4. Umpiry, "David Volfson vs Alex Blumenberg — USA F22 Round of 32", https://umpiry.com/match/2017-06-26/blumenberg-vs-volfson-usa-f22-r32?utm_source=cite (as of 26 June 2017).