The ATP Finals is almost over. As the last tournament before the men's season ends, and all fans go into hibernation until January, it's the last chance for the top players of the year to make a statement. This year, Novak Djokovic, Roger Federer, Kevin Anderson and Alexander Zverev made it to the semifinals.

The unique event's history is rich, going under multiple different names and switching locations often. Test yourself on how much you know about the ATP Finals: