Roger Federer's Switzerland beat Serena Williams' USA as the two tennis greats met on court for the first time at the Hopman Cup in Perth, Australia.
Federer and Belinda Bencic beat Serena and Frances Tiafoe 4-2 4-3 (5-3) in a mixed-doubles contest to secure a 2-1 win in the round-robin tie.
Federer and Serena, both 37, earlier won their respective singles matches.
Federer and Serena have won a combined 43 Grand Slam singles titles, and have spent a combined 621 weeks at world number one.
The match had been described as the most anticipated contest involving a male and female player since the 'Battle of the Sexes' in 1973, when 39-time Grand Slam champion Billie Jean King beat former men's world number one Bobby Riggs in straight sets.
Before the mixed-doubles contest, Federer beat Tiafoe 6-4 6-1 before Serena levelled the tie with a 4-6 6-4 6-3 victory over Bencic.
The Hopman Cup comprises two singles and a mixed doubles match between nations in a round-robin format with two groups of four. The winners of each group will contest Saturday's final.
Defending champions Switzerland play Greece in their final round-robin match on Thursday while the USA face Great Britain's Cameron Norrie and Katie Boulter.
- Source: News websites