The tennis world reacted with stunned disbelief on Thursday as word of Wimbledon champion Marion Bartoli's retirement spread, leaving the sport without one of its most popular champions and intriguing personalities.

Following a second-round loss at the Western and Southern Open on Wednesday, the 28-year-old Frenchwoman walked off the court and two hours later stepped into a media conference to shock everyone, saying: "I feel it's time for me to walk away".

Immediately social media exploded with fans, coaches, commentators and players, past and present, reacting with surprise and support.