1973 Battle of the Sexes was about social change - King

American tennis legend Billie Jean King says the upcoming 'Battle of the Sexes' match between Aryna Sabalenka and Nick Kyrgios is "not the same" as her 1973 victory over Bobby Riggs, which she says was about "social change".

READ MORE: 'Mine was for social change, this is not' - King on Battle of the Sexes