A crowd of 42,217 watched an exhibition match between Federer and Zverev at Plaza de Toros Mexico – the world's largest bullring – in Mexico City on Saturday.
Serena Williams and Kim Clijsters had previously set the record in their exhibition contest in 2010, which attracted 35,681 fans in Brussels.
But that figure was topped as 20-time grand slam champion Federer defeated Zverev 3-6 6-4 6-2 in the "The Greatest Match".
— Roger Federer (@rogerfederer) November 24, 2019
Afterwards, Federer tweeted: "I will never forget this magical evening in Mexico City with @AlexZverev 42,517 people came, We broke this record together! Viva Mexico."
— Mextenis (@mextenis) November 24, 2019
Photo Twitter: @rogerfederer Caption: Roger Federer played in front of a world-record crowd against Alexander Zverev