Roger Federer finds stubborn Mischa Zverev not to be sneezed at

• Federer shrugs off cold to win 7-6 (3), 6-4, 6-4 on Centre Court• No3 seed to play Grigor Dimitrov in the fourth round of Wimbledon It might be sacrilege to say it around these parts, but Roger Federer is not yet humming at his imperious best. There have been ripples of genius, not sustained waves. Flat spots as well as staggering shots. Even so, the No3 seed was plenty good enough to fend off Mischa Zverev's stubborn challenge in three tight sets as the evening closed in - now, for the go...