Anton Chekhov advanced when Arturs Lazdins retired 7-6 1-0 in the M25 Nonthaburi 1 qualifying round of 16.
Chekhov A. advanced when Lazdins A. retired.
Anton Chekhov beat Arturs Lazdins 7-6(8) 1-0 after Arturs Lazdins retired. Umpiry, "Anton Chekhov vs Arturs Lazdins — M25 Nonthaburi 1 Qualifying Round of 16", https://umpiry.com/match/2019-05-21/chekhov-vs-lazdins-m25-nonthaburi-1-q16?utm_source=cite (as of 21 May 2019).