Igor Ribeiro Marcondes defeated Sebastian Baez 6-0 6-3 in the Argentina F7 qualifying round of 64 on clay. The upset overturned the form book — Sebastian Baez came in ranked #53.
Marcondes I. took it in straight sets.
Igor Ribeiro Marcondes beat Sebastian Baez 6-0 6-3. Umpiry, "Igor Ribeiro Marcondes vs Sebastian Baez — Argentina F7 Qualifying Round of 64", https://umpiry.com/match/2016-05-16/baez-vs-marcondes-argentina-f7-q64?utm_source=cite (as of 16 May 2016).