Joao Walendowsky defeated Gunther Matta 6-0 6-0 in the USA F8 qualifying round of 64 on clay.
Walendowsky J. took it in straight sets.
Joao Walendowsky beat Gunther Matta 6-0 6-0. Umpiry, "Joao Walendowsky vs Gunther Matta — USA F8 Qualifying Round of 64", https://umpiry.com/match/2015-02-16/matta-vs-walendowsky-usa-f8-q64?utm_source=cite (as of 16 February 2015).