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American siblings Venus and Serena Williams will play an exhibition tennis match in Johannesburg in November.
Venus, a five-time Wimbledon champion, said she looked forward to facing her sister for the first time on African soil.
Serena is the form player in women's tennis right now, having just won the US Open on the back of Wimbledon and her olympic gold.
Apart from the exhibition match, the sisters will launch the Breaking the Mould women's campaign during their visit.