Tomas Berdych, Janko Tipsarevic and Milos Raonic advanced to the quarterfinals of the Japan Open with comfortable victories on Thursday.
Second-seeded Berdych of the Czech Republic earned a 6-3, 7-5 victory over Alejandro Falla of Colombia, Serbia's Tipsarevic beat Marco Chiudinelli of Switzerland 6-4, 6-2, and Canada's Raonic went through when Serb Victor Troicki retired with injury when trailing 3-0 in the first set.
Tipsarevic will take on Raonic in the quarters, while Berdych will play either Spain's Tommy Robredo or local hope Kei Nishikori.
Top-seeded Andy Murray had already booked his spot in the quarters on Friday, when he will meet Switzerland's Stanislas Wawrinka.
Berdych exhibited solid groundstrokes and a strong serve throughout the match at Ariake Colosseum, and closed it out with his ninth ace.
The first set was on serve until the sixth game, when Berdych reeled off three backhand winners to break and go up 4-2. Berdych took the set 6-3 in 30 minutes.