Reportedly, the tickets for the match between multiple Grand Slam champions Rafael Nadal (16) and Roger Federer (17) were sold out in under 10 minutes.
The game at the Cape Town Stadium, built for the 2010 FIFA World Cup, is set to break the attendance record of 35,681 for a tennis match set by Kim Clijsters and Serena Williams in 2010 in Brussels.
A spokeswoman for the organisers of the Cape Town match said the tickets were snapped up online and at ticket outlets.
"We are overwhelmed by the enthusiastic reaction on our ticket sales and we sincerely thank you for the overwhelming support," said Janine Handel, chief executive of the Roger Federer Foundation.
"Lines were opened up by (online ticket sellers) Computicket at 0900 and within a record time of fewer than 10 minutes the tickets were sold." Handel said the organisers would consider erecting additional stands to cater for some of those who could not buy tickets Wednesday.
With Agency Inputs
Prices ranged from 150 to 1950 rand ($10 to 130/9 to 119 euros) and buyers were restricted to a maximum of six for the February 7 exhibition.