Martin Vassallo Arguello advanced when Mateusz Kowalczyk retired 6-0 2-0 in the Sopot qualifying round of 16.
Vassallo Arguello M. advanced when Kowalczyk M. retired.
Martin Vassallo Arguello beat Mateusz Kowalczyk 6-0 2-0 after Mateusz Kowalczyk retired. Umpiry, "Martin Vassallo Arguello vs Mateusz Kowalczyk — Sopot Qualifying Round of 16", https://umpiry.com/match/2006-07-30/arguello-vs-kowalczyk-sopot-q16?utm_source=cite (as of 30 July 2006).