More than 50 years ago, Billie Jean King faced Bobby Riggs in a 'Battle of the Sexes' match, attracting a worldwide television audience of 90 million and going down in cultural folklore with the aid of a Hollywood depiction.
Now, another iteration of their era-defining clash has been announced - featuring two of the most recognisable faces among the modern crop in Aryna Sabalenka and Nick Kyrgios.
Sabalenka, the women's world number one, is set to face Kyrgios, a controversial figure now ranked 652nd after being beset by injuries, in Dubai on 28 December.
BBC Sport analyses why the event is taking place, how it will look different in an attempt for an equal contest and what is at stake for both players.