US Open tennis champion Andy Murray has challenged women's world number one Serena Williams to a showdown in Las Vegas that would evoke memories of the famous 'battle of the sexes' 40 years ago.
Murray threw down the gauntlet to Serena after responding to a Twitter follower who claimed the American could beat her male counterpart.
The world number two's proposal, however light-hearted he intended it to be, sparked thoughts of the time when 55-year-old Bobby Riggs, a tennis superstar of the 1930s and 1940s, took on female greats Margaret Court and Billie Jean King.
Those matches in 1973 drew huge worldwide attention, with Riggs easily beating Court in the first clash.
That prompted King to challenge Riggs to a match in Houston and this time it was the woman who won an historic meeting which is now regarded as a defining moment in the rise in popularity of the feminist movement.
In 1992, Jimmy Connors defeated Martina Navratilova in Las Vegas.
Murray says he'd be up for the challenge. He's never hit with her but he says she's obviously an incredible player and he thinks people would be interested to see the men play against the women, to see how the styles match up.