Chilean qualifier Nicolas Jarry advanced to the last 16 of the ATP 500 Rio Open on Monday with a 6-4, 6-1 win over third seed Lorenzo Musetti of Italy.
Jarry, currently ranked 136th, won 86 percent of his first serves and converted four of five break points to prevail in an hour and 13 minutes on the outdoor clay of the Jockey Club Brasileiro in Rio de Janeiro.
Musetti looked off his game from the outset, serving four double faults and landing just 57 percent of his first serves in play.
Former US Open champion Dominic Thiem was another big-name casualty on Monday, falling to local favorite Thiago Monteiro 6-1, 3-6, 7-6.
The 29-year-old Austrian, whose world ranking has plummeted to No. 99 after reaching a career-high No. 3 in March 2020, was beset by unforced errors and won just one of five break-point opportunities against the 83rd-ranked Brazilian.
Meanwhile, Slovakian ninth-seed Alex Molcan eased into the round of 16 with a 6-0, 6-3 win over Brazilian Joao Fonseca. ■