"I've always wanted to come here," said the elder Williams sister, adding she expected to continue taking trips where athletic competition is not the primary focus.
"When you get a little older, you start to realise that you want to help other people and that that is more important than the other dreams you may have had," she said.
They began their day with a visit to Lagos state Governor Babatunde Fashola and ran a tennis clinic at the exclusive Ikoyi Club, where they schooled a group of children in some tennis basics.
One youngster stood frozen in a wide-legged stance while Venus offered racket instruction, while another said he gradually grew more confident as the lesson progressed.
"When I played them I felt nervous at first, playing one of the best in the world," said eight-year-old Akinola Ogunleye. "Then I got used to playing them ... If they can be that, why can't I?"
The sisters will today visit a puberty education class for girls and play a head-to-head exhibition match tomorrow before leaving for South Africa. While the trip is aimed at empowering young African women and girls, Venus said she also expected to benefit. "We're looking forward to being inspired by the young women in Nigeria and also to inspire them as well ... "
- AAP