Novak Djokovic won a ridiculous amount of money playing tennis this year

Novak Djokovic capped a dominating 2015 season with a win at the Barclays World Tour Finals in London this weekend. To get a sense of just how dominating Djoker was this year, we need look only at how much money he made on the ATP Tour.

Djokovic finished the year with $21.6 million in winnings on the Tour, nearly $5 million more than the next two men's tennis players combined, Roger Federer and Andy Murray. But perhaps more impressive is that the ATP Tour tournaments this season handed out $151.4 million to over 3,500 players in singles events, and Djokovic won 14% of that money.

Here are the top 20 players prize money leaders on the Tour this season. There was Djokovic and there was everybody else.

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