(CNN) -- The life of a tennis professional is tough, but the rewards are plentiful -- and not just in a financial sense.
The long trawl around the globe on both the men's and women's tours has often been a breeding ground for blossoming courtships, as lovestruck couples decide it is game, set and match while gazing at the figure on the opposite baseline.
With Valentine's Day upon us, CNN World Sport charts the 15 top romances involving the stars of tennis in the gallery above. If you disagree, or think we've missed any out, let us know in the comments section below the story.
Who could forget the enduring romance of Andre Agassi and Steffi Graf, both multiple grand slam winners, whose love was reputedly cemented at the 1999 French Open champions' ball and is still going strong after 10 years of marriage?
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.
But it is not all happily ever after. Chris Evert, an 18-time grand slam champion, has served love games to two fellow professionals -- Jimmy Connors and John Lloyd -- only for cupid to return a double fault.
Several high-profile recent relationships have proved the kinship between tennis and other sports too, especially golf.
Golf star Rory McIlroy, who won the 2011 U.S. Open, is currently dating former tennis world No. 1 Caroline Wozniacki. The partnered pair refer to themselves as "Wozilroy."
Another golfer, Australia's Adam Scott, has recently rekindled his romance with glamorous Serbian tennis star Ana Ivanovic, the 2008 French Open champion.
Tennis has long been linked with showbiz, and high-profile names in the game have often mingled with stars of stage and screen.
British pop crooner Cliff Richard's relationship with 1976 French Open winner Sue Barker made waves in the early 1980s, while Agassi's brief marriage to American actress Brooke Shields also attracted a deluge of headlines.