Adding to the tension, Federer was dealing privately with the tightly guarded news that he and Mirka were expecting twins in the summer.

压力还在不断增加，私下里，费德勒得到外界不得而知的消息，今年夏天，米尔卡要生的是双胞胎。

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Roger Federer became a father of twin girls after his wife Mirka gave birth Thursday evening in Switzerland.

瑞士当地时间23日晚，网球天王费德勒爱妻米尔卡顺利产下双胞胎姐妹。

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Federer and Mirka, both tennis players, announced in March this year that they were expecting their first child.

费德勒夫妇都是网球运动员，于今年4月在瑞士完婚。

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One of the game's greatest ever players, Roger Federer, met his wife Mirka when the pair represented Switzerland at the Sydney Olympics in 2000.

CNN: 15-love: Top tennis romances

Federer has also adapted to life as a father, after his wife Mirka gave birth to twin girls in 2009, although his daughters are still too young to fully appreciate who their father is.

CNN: Federer: 'Naive to think tennis is clean'