[HIGHLIGHTS] Facundo Díaz Acosta remains unbeatable: he beat Wawrinka in his debut at the ATP 500 in Rio de Janeiro

Facundo Díaz Acosta beat Stan Wawrinka 7-5, 6-4 in the first round of the ATP 500 tournament in Rio de Janeiro. The 23-year-old Argentine won the Argentina Open last Sunday.

He will now face Sebastián Báez, who beat Frenchman Corentin Moutet. Pedro Cachín was eliminated by local Felipe Meligeni Alves. Federico Coria and Mariano Navone, rivals to 4, secure a new Argentine in the second round.