Hugo Di Feo advanced when Roy Smith retired 6-4 in the USA F22 round of 16.
Di Feo H. advanced when Smith R. retired.
Hugo Di Feo beat Roy Smith 6-4 after Roy Smith retired. Umpiry, "Hugo Di Feo vs Roy Smith — USA F22 Round of 16", https://umpiry.com/match/2017-06-26/feo-vs-smith-usa-f22-r16?utm_source=cite (as of 26 June 2017).