"Kei's a tough customer. This is a huge win for me in my career," Federer said. "Kei will give you some looks, he's not the biggest server on tour but one of the greatest on the baseline. "Federer holds a career 2-0 record over Zverev, who pulled off a massive upset over world number one Andy Murray earlier on Sunday. "I would never have picked it, I like Mischa a lot and he has a nice game coming forward.

Source: Times of India January 22, 2017 12:42 UTC