Factbox: List of Wimbledon Men's Singles Champions

Tennis - Wimbledon - London, Britain - July 16, 2017 Switzerland's Roger Federer celebrates winning the final against Croatia's Marin Cilic REUTERS/Toby Melville Reuters From 1877 to 1921 the men's singles was decided on a challenge-round system with the previous year's winner automatically qualifying for the final (British unless stated): Winner of all-comers' final declared champion. Not all U.S. presidents are missed once they leave the White House. The Tesla and SpaceX CEO urged governors to regulate artificial intelligence before it's too late. Administration officials traveled to Providence to gain support from key players like Gov. Brian Sandoval. Prime Minister Justin Trudeau and other foreign leaders reached out to U.S. governors ahead of slated talks.