Boris Becker felt Novak Djokovic was too passive as he bowed out of the Australian Open against Denis Istomin.
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Djokovic, who has won six of his 12 grand slams at the Australian Open, entered as the second-ranked player in the world. "Istomin gained his way into this major only via a wild-card berth. At 30, he's one year older than Djokovic, but he was still bouncing between $50,000 Challenger tournaments
The last time Roger Federer met Tomas Berdych before the fourth round of a tournament, the Czech was 22 years old and the pair were at the Beijing Olympics. Since that third-round encounter, which Federer won, they have met 13 times in knockout matches, 11 of which have been in quarter-finals or later