Stan Wawrinka on semifinal loss to Federer: 'I didn't feel pressure'

Stan Wawrinka says he did not have a mental letdown against Roger Federer in their semifinal meeting at the Australian Open, but acknowledged that a spate of errors in the fifth allowed Federer to take the lead.

"No, I didn't feel pressure," Wawrinka told reporters following the five-set encounter, in which he came from two sets down and had break point twice in the fifth set.

The fourth seed pointed to an error on his second break point in the fifth game of the fifth set.

"I was a little bit surprised,” he said. “I didn't [go] back quickly enough when he came a little bit higher with his backhand. I was expecting him to be really aggressive on that shot, and he completely changed. I was too high on my legs. Then he [played] well."

Federer held, and Wawrinka then played what he described as a poor game to get broken.

"New balls,” Wawrinka said. “He made two good returns to be 15-30. Then he put me under pressure. Made a bad choice, a double fault, and you're down a break in the fifth."

Wawrinka, who called the trainer for a knee injury following the second set, said he would get the knee looked at upon his return to Switzerland.

With his semifinal run, Wawrinka will return to No. 3 in the rankings.