US tennis star Serena Williams hopes her African tour with elder sister Venus will encourage athletes on the continent to strive for excellence in their sport.
The pair, who have won a combined 22 major women's singles championships, are in Nigeria before heading to South Africa in a two-country visit to promote women's rights.
"We would definitely love to see more athletes come out of Africa," said Serena.
"We were able to break the mould in a sport that was just really dominated by white people and to have a face of colour that can come in and dominate [shows] it doesn't matter what your background is and where you come from," she said.
Serena, 31, has visited other African nations before, while Venus, 32, landed on the continent for the first time.