Roger Federer had few problems against his compatriot Stanislas Wawrinka as the Swiss veteran eased to a 6-3 6-4 victory at the BNP Paribas Open in Indian Wells.
The five-time champion has won 22 of his 25 encounters with Wawrinka, who never looked as though he could cause an upset.
"I think I felt good from the beginning," said Federer afterwards. "The breeze picked up a little bit for the evening, I thought, but I didn't feel like it had that much of a play in it.
"I think for me the plan worked. I was able to mix up my game, cover my serve, be dangerous on the return. Maybe take some rhythm away from Stan, like I always try to do, but you can't always make it work."
The 37-year-old Federer managed to avoid Novak Djokovic's fate as the world number one suffered a shock 6-4 6-4 defeat to Germany's Philipp Kohlschreiber.
Federer will play Kyle Edmund in the next round and said of the British number one: "I have never played him, and so that's exciting, especially an established player… I think he's a really nice guy.
"He has a very similar backhand to [Andy] Murray in some ways. And the forehand really goes. He's got some major power there. He can also serve big in the first serve."
Edmund easily beat Radu Albot 6-3 6-3 and is 7/2 to cause a major surprise by beating Federer, who is 4/7 to win the Indian Wells title.
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