In pictures: Federer, Serena lead Wimbledon 2018 Day One

Eight-time champion Roger Federer and seven-time winner Serena Williams shrugged off 30-degree heat to breeze into the Wimbledon second round Monday. Top seed Federer marched out on Centre Court dressed for the first time in gear designed by Japanese giant Uniqlo in a deal reported to be worth $300 million after a two-decade association with Nike.
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Switzerland's Roger Federer celebrates after beating Serbia's Dusan Lajovic 6-1, 6-3, 6-4 in their men's singles first round match on the first day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 2, 2018.
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US player Serena Williams returns against Netherlands' Arantxa Rus during their women's singles first round match on the first day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 2, 2018.
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Switzerland's Stan Wawrinka prepares to serve to Bulgaria's Grigor Dimitrov during their men's singles first round match on the first day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 2, 2018.
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US player Venus Williams returns to Sweden's Johanna Larsson during their women's singles first round match on the first day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 2, 2018.
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Canada's Milos Raonic serves against Britain's Liam Broady during their men's singles first round match on the first day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 2, 2018. - Raonic won the match 7-5, 6-0, 6-1.
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Donna Vekic of Croatia celebrates after defeating Sloane Stephens of the United States after their Ladies' Singles first round match on day one of the Wimbledon Lawn Tennis Championships at All England Lawn Tennis and Croquet Club on July 2, 2018 in London, England.
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Croatia's Marin Cilic returns to Japan's Yoshihito Nishioka during their men's singles first round match on the first day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 2, 2018.
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Netherlands' Arantxa Rus returns against US player Serena Williams during their women's singles first round match on the first day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 2, 2018.
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France's Gael Monfils commiserates with France's Richard Gasquet after winning 7-6, 7-5, 6-4 in their men's singles first round match on the first day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 2, 2018.
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Members of the public shelter from the sun as they sit on Murray Mount to watch the play on a giant screen at The All England Tennis Club in Wimbledon, southwest London, on July 2, 2018, on the first day of the 2018 Wimbledon Championships tennis tournament.
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Sam Querrey of the United States celebrates winning his Men's Singles first round match against Jordan Thompson of Australia on day one of the Wimbledon Lawn Tennis Championships at All England Lawn Tennis and Croquet Club on July 2, 2018 in London, England.
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Ballgirls watch France's Gael Monfils return to France's Richard Gasquet during their men's singles first round match on the first day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 2, 2018.