Daniel Munoz de la Nava advanced when Facundo Arguello retired 5-0 in the US Open qualifying round of 128.
Munoz de la Nava D. advanced when Arguello F. retired.
Daniel Munoz de la Nava beat Facundo Arguello 5-0 after Facundo Arguello retired. Umpiry, "Daniel Munoz de la Nava vs Facundo Arguello — US Open Qualifying Round of 128", https://umpiry.com/match/2013-08-21/arguello-vs-nava-us-open-q128?utm_source=cite (as of 21 August 2013).