Everything you need to know about tennis's most controversial match in 52 years: Aryna Sabalenka takes on Nick Kyrgios in 'Battle of the Sexes' today on a mismatched court with a bizarre set of rules
52 years ago, tennis became bigger than sport when world No 1 Billie Jean King picked up the gauntlet thrown down to her by ageing former player Bobby Riggs and threw it back in his face.