Spain's Carlos Alcaraz beats Portugal's Nuno Borges 6-3, 6-1 in second round. The 19-year-old took the first set in just over an hour.
The match was played in straight sets in front of a partisan crowd at the Estadio Olimpico do Maracanã in Rio de Janeiro. The winner will face either Argentina's Juan Martin del Potro or Brazil's Diego Schwartzman in the quarter-finals on Thursday. The final will be played on Sunday.