Canada's Vasek Pospisil ran out of gas at the Australian Open as his bid to reach the quarterfinals ended Saturday in a three-set loss.
It will be Spain's Guillermo Garcia-Lopez who gets a crack at defending champion Stan Wawrinka.
Still alive in the men's competition: fellow Canadian Milos Raonic, who also met another Spaniard, 12th-seeded Feliciano Lopez, in the fourth round.
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Saturday was the final day of competition for American men at Melbourne. No. 19 John Isner lost to Luxemburg's Gilles Muller 7-6 (4), 7-6 (6), 6-4. And Steve Johnson couldn't hold an early advance in a 6-7 (7), 6-1, 6-2, 6-3 loss to No. 5 Kei Nishikori of Japan.
Raonic plays in Aussie's second week for the third time in five years thanks to Saturday's 6-4, 6-3, 6-3 win over Germany's Benjamin Becker.
"I'm happy with how I'm playing," said Raonic, No. 8 in men's seedings. "I can't complain, everything has been working for me on this court and the results have been good.
"My game feels great and I'm having a lot of fun. I look forward to going on."
Canada's Eugenie Bouchard also remains in competition at Melbourne, but her next match will be a challenge. She faces Maria Sharapova.
Saturday wasn't Pospisil's day.
"I just didn’t feel good on the court, right from the beginning," he said. "I was really struggling with my timing, with my serve, in general it was a really bad start. He came out really sharp. I didn’t. I just got beat, yeah, pretty much."
His faults included 40 unforced errors, and Pospisil failed to hold service six times.
"I wanted to do well here," he said. "Maybe I put some pressure on myself. I believed I could play well. My serve was off and that's a weapon that helps me to win matches."
It was a long week for Pospisil. He needed five sets to knock out American Sam Querrey in the first round and four to topple Italy's Paolo Lorenzi in a hot, humid match.