Roger Federer praised the resilience of first-round Australian Open opponent Lu Yen-Hsun after his straight-sets win.
Roger Federer won through to the second round of the Australian Open on Monday, but did not have it all his own way.
And the world number two paid tribute to Lu Yen-Hsun for his efforts in Melbourne.
Federer - bidding to win a fifth Australian Open crown - was rusty in his 6-4 6-2 7-5 victory at Rod Laver Arena.
While the 17-time grand-slam champion was always on track to make it through to the next round, where he will play Simone Bolelli, he was not at his free-flowing best, tallying up 37 unforced errors.
"You know, winning first round, it's always a bit of a relief," Federer said. "I thought I was playing very well through the first couple of sets.
"I think I was serving very well. I was holding my service games very comfortably. Until probably 5-2 in the second set was the first time he had any play on my service game.
"I was very happy. I was returning and able to dominate the plays from the back. I think he started to serve better in the third - I think conditions slowed down a bit.
"Because of the coolness and the night coming in, I felt it was hard to generate stuff. It became a very interesting third set. Instead of sort of just steamrolling through him he really made it tough for me.
"I don't want to say I got lucky to not be broken early on in the third, but he was playing some really good tennis. I started to mix it up and trying out things because I had to, I felt, towards the end of the third."