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Test your knowledge of the recent ATP Finals champion.

The Austrian has signed on to compete at TD Garden in Boston, his third event appearance.

Murray was confused by the Russian's lack of on-court celebration after winning the title.

The world No. 4 became the first Russian singles player to win the ATP Finals since 2009.

The Russian capped off a wild year in perfect fashion.

The Russian won the biggest title of his career at the ATP Finals. 

The world No. 4 has not lost a single set at the ATP Finals and will face Nadal next. 

With a convincing 6-3, 6-3 score the Russian secured his spot in the London semifinals.

Prakash Amritraj and Paul Annacone whip up the ultimate study guide. 

Back in 2009, the world and the field looked very different. 

The Russian dismissed Alexander Zverev, 6-3, 6-4, on Monday at the ATP Finals.

Medvedev eased past Zverev while Djokovic dismissed Schwartzman. 

Lacoste represents two of the world's Top-5 players in Daniil Medvedev and Novak Djokovic.

The top eight players are preparing to battle for the ATP Finals title in London.