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It's time to buy a new hat! The 2013 Wimbledon champion Andy Murray is to marry his long-time girlfriend Kim Sears. John Stillwell - WPA Pool/Getty Images
Murray's Mom Judy (left) once described Kim as the "best thing to happen to Andy." They met through Nigel Sears (right) her Dad and a former British tennis coach. Clive Brunskill/Getty Images
Kim and Andy looked loved up as they watched the USA basketball team at Madison Square Gardens in the build-up to the 2014 U.S. Open. Al Bello/Getty Images
World No. 1 Novak Djokovic married his girlfriend Jelena Ristic after winning a second Wimbledon title in 2014. JORGE FERRARI/AFP/Getty Images
The couple announced the birth of their first child, son Stefan, in October. Gareth Cattermole/Getty Images
Roger Federer's immediate family -- wife Mirka and twin girls Myla Rose and Charlene Riva -- also expanded in 2014. Julian Finney/Getty Images
Mirka -- seen here celebrating her husband's first Wimbledon title in 2003 -- gave birth to twin boys Lenny and Leo in May. Bongarts/Getty Images
Rafael Nadal is the last of the "Big Four" to remain eligible ... Although his girlfriend Xisca Perello would definitely disagree. Julian Finney/Getty Images for ATP
Nadal and his longtime girlfriend make a rare public display of affection at the French Open. Clive Brunskill/Getty Images
