Jannik Sinner advanced when Lukas Rosol retired 6-2 3-0 in the Budapest qualifying round of 16.
Sinner J. advanced when Rosol L. retired.
Jannik Sinner beat Lukas Rosol 6-2 3-0 after Lukas Rosol retired. Umpiry, "Jannik Sinner vs Lukas Rosol — Budapest Qualifying Round of 16", https://umpiry.com/match/2019-04-20/rosol-vs-sinner-budapest-q16?utm_source=cite (as of 20 April 2019).