Dusan Vemic advanced when Juan Pablo Guzman retired 6-2 1-0 in the Houston qualifying round of 16. Dusan Vemic claimed a first win over Juan Pablo Guzman in two meetings, levelling the head-to-head at 1–1.
Vemic D. advanced when Guzman J. retired.
Dusan Vemic beat Juan Pablo Guzman 6-2 1-0 after Juan Pablo Guzman retired. Umpiry, "Dusan Vemic vs Juan Pablo Guzman — Houston Qualifying Round of 16", https://umpiry.com/match/2007-04-08/guzman-vs-vemic-houston-q16?utm_source=cite (as of 8 April 2007).