Dominic Thiem advanced to the quarter-finals of the Rio Open on Wednesday with a 6-2, 7-5 win over Serbia’s Dusan Lajovic.
Thiem had won both their previous meetings and was never in trouble after saving two break points with the score at 2-2, before rattling off four straight games to take the opening set.
Lajovic then spurned three break points at 1-1 in the second set, before the second seed and world number 8 earned the key break in the 11th game.
Thiem will now meet Argentina’s Diego Schwartzman in the last eight after he defeated his countryman Federico Delbonis 6-4, 7-6(1).
Number five seed Albert Ramos-Vinolas also moved into the quarter-finals with an easy 6-2, 6-3 win over Italy’s Fabio Fognini.
A finalist at Rio in 2015, Fognini was hoping to record a 300th ATP World Tour singles victory against Ramos-Vinolas, but it was the Spaniard who earned a second successive victory over the Italian to set up a quarter-final with qualifier Nicolas Kicker.
Kicker earlier beat Arthur De Greef of Belgium 6-3, 6-3.