Zheng upsets No. 1 Ivanovic at Wimbledon (AP): "
Roger Federer's next opponent at Wimbledon is the last man to win the title before the Swiss star began his run of five straight championships. And beyond that could be a matchup with the last player to beat him at Wimbledon six years ago. After a relatively easy stroll through the first three rounds, things could start to get trickier for Federer as he continues his march toward a sixth...
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