Serena Williams delivered on her promise to avenge an earlier loss to Venus, beating her 6-3, 6-4 in South Africa on Sunday for just her fourth win in 13 exhibition matches between the sisters.

Serena, the current Wimbledon, U.S. Open and Olympic champion, lost in straight sets to Venus in Nigeria on Friday.

Venus wore an eye-catching maroon and white dress. She laughed and joked and played up to the crowd throughout the match at Ellis Park Indoor Arena.

Serena was serious in the first set but lightened up in the second, rallying with a delighted ball girl at one point while Venus left the court for a bathroom break.