London

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Eugenie Bouchard of Canada plays a return to Simona Halep of Romania during their women’s singles semifinal match at the All England Lawn Tennis Championships in Wimbledon, London, Thursday, July 3, 2014. (AP Photo/Ben Curtis)

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Petra Kvitova of Czech Republic celebrates after defeating Lucie Safarova of Czech Republic in their women’s singles semifinal match at the All England Lawn Tennis Championships in Wimbledon, London, Thursday, July 3, 2014. (AP Photo/Ben Curtis)

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In this Tuesday, June 17, 2014 photo, elderly people participate at a special parkour class at a park in south London. The unique weekly class for people over 60 called parkour, a flashy discipline usually known for its acrobatic running, climbing and gravity-defying jumps. The London parkour class is taught by two instructors who have adapted the sport’s main elements to a level that can be handled even by those over 60. The parkour instructors said everyone who takes the class fills out a health form and they are particularly careful to dissuade participants from doing too much. (AP Photo/Lefteris Pitarakis)

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Nick Kyrgios of Australia celebrates after winning a point against Rafael Nadal of Spain during their men's singles match on Centre Court at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday, July 1, 2014. (AP Photo/Ben Curtis)

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Nick Kyrgios of Australia celebrates after defeating Rafael Nadal of Spain in their men's singles match at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday July 1, 2014. (AP Photo/Ben Curtis)

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Rafael Nadal of Spain plays a return to Nick Kyrgios of Australia during their men's singles match at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday July 1, 2014. (AP Photo/Ben Curtis)

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Nick Kyrgios of Australia reacts as he misses a point against Rafael Nadal of Spain during their men's singles match at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday, July 1, 2014. (AP Photo/Ben Curtis)

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Rafael Nadal of Spain leans back as he prepares to serve to Nick Kyrgios of Australia during their men's singles match on Centre Court at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday, July 1, 2014. (AP Photo/Ben Curtis)

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Court officials talk to Serena Williams and Venus Williams, left, of the U.S as they retire after 3 games from their women's doubles match against Kristina Barrois of Germany and Stefanie Voegele of Switzerland at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday July 1, 2014. (AP Photo/Pavel Golovkin)