The Princess of Wales and the tennis ace, both 41, have been friends for years after meeting at Wimbledon, and have shared plenty of playful moments together.
Roger Federer corrects Kate Middleton's Wimbledon mistake pakobserver.net - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from pakobserver.net Daily Mail and Mail on Sunday newspapers.
Roger Federer and ball girl correct Kate Middleton's tennis mistake on Wimbledon court independent.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from independent.co.uk Daily Mail and Mail on Sunday newspapers.