After spending three days in Lagos, Nigeria, the Williams sisters went south to Johannesburg, South Africa.
One of the items on the agenda on Day 1 of their stay in Johannesburg was a press conference at Monte Casino.
Then it was time for a two hour clinic for children and wheelchair players over at the Arthur Ashe Academy.
The Arthur Ashe Academy is located in the Soweto suburb - a syllabic abbreviation for South Western Townships.
Serena Williams at the Arthur Ashe Academy in Soweto, instructing a group of children in a tennis clinic.
Serena Williams is currently ranked No.3 in the world but very close to returning to her former No.1 status.
With a strong performance at the Australian Open - where she has won five times - she could get back to No.1.
Serena Williams has 15 Grand Slams - five Australian Opens, one French Open, five Wimbledons, four US Opens.
Venus Williams at the kids clinic. Venus Williams has seven Grand Slams - five Wimbledons and two US Opens.
Serena Williams has visited African nations before - Venus Williams is making her first trip to the continent.
The Williams sisters' trip to Africa this week was aimed at promoting empowerment and 'Breaking The Mould'.
And they weren't just there to empower young girls and children - they also had a wheelchair tennis segment.
Like Serena Williams, Venus Williams is a former World No.1, and was ranked No.2 as recently as July 2010.
Combined, the Williams sisters have 134 career weeks at No.1 - Venus had the first 11, Serena the next 123.
The Williams sisters went to the Ellis Park Indoor Arena on Sunday for the second exhibition match of the week.
Venus Williams, who had won their first exhibition in Lagos, 64 75, played it up to the crowd of 4,000.
With family and team watching - including mother Oracene - Serena Williams was out for some sisterly revenge.
Serena Williams met her big sister at the net after getting that revenge for the Lagos loss, winning, 63 64.
Serena Williams told the crowd afterwards they and their country were absolutely amazing, and vowed to return.
The Williams sisters have played in North America, South America, Europe, Asia, Australia and now Africa.