The Laver Cup next week in London will be his final ATP event.
Roger Federer celebrates after winning an exhibition match against Rafael Nadal.
This was the first time that Nadal and Federer faced each other in sub-Saharan Africa
Federer faces top seed Djokovic in tomorrow's final.
The Majorcan whipped a forehand winner on match point to make sure it was game on with Federer in tomorrow's semi-final.