The ATP World Tour Finals is almost here and the John McEnroe group—Andy Murray, Marin Cilic, Stan Wawrinka, and Kei Nishikori—will face off against each other for two spots in the semifinals. Who will reign supreme? Here is a brief rundown of each player.

Age: 29

Ranking: No. 1

Win/loss record vs. each player in the group:

11-3 vs. Cilic

9-7 vs. Wawrinka

7-2 vs. Nishikori

Best moment of 2016: The Brit became the first player in tennis history to win back-to-back singles gold medals at the Olympic Games in Rio.

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Worst moment of 2016: He was a semifinalist in Indian Wells in 2015, but was upset this year in the third round by world No.53 Federico Delbonis.

Age: 31

Ranking: No. 3

Win/loss record vs. each player in the group:

7-9 vs. Murray

4-2 vs. Nishikori

10-2 vs. Cilic

Best moment of 2016: The Swiss stayed mentally tough and overcame very sore legs to defeat Novak Djokovic in the US Open final, leaving him only a Wimbledon win away from completing a career Grand Slam.

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Worst moment of 2016: He took a nose dive in his first match in the Paris Masters and was upset by No. 91-ranked Jan-Lennard Struff.

ATP World Tour
Finals Preview: The
John McEnroe group

ATP World Tour Finals Preview: The John McEnroe group

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Age: 26

Ranking: No. 5

Win/loss record vs. each player in the group:

2-7 v.s Murray

2-4 vs. Wawrinka

7-5 vs. Cilic

Best moment of 2016: Nishikori won bronze at the Olympic Games—the first Japanese player to do so—by taking down Rafael Nadal in a climatic battle.

Worst moment of 2016: Nishikori lost in the second round in the Rakuten Open to No. 34-ranked Joao Sousa, a loss that stung a little worse because it was in his home country of Japan.

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ATP World Tour
Finals Preview: The
John McEnroe group

ATP World Tour Finals Preview: The John McEnroe group

Age: 28

Ranking: No. 7

Win/loss record vs. each player in the group:

3-11 vs. Murray

2-10 vs. Wawrinka

5-7 vs. Nishikori

Best moment of 2016: After 11 years on tour, Cilic finally won his first Masters tournament in Cincinnati, defeating Murray in the final.

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Worst moment of 2016: The Croatian was caught off guard by world No. 166 Marco Trungelliti in the first round of Roland Garros.

ATP World Tour
Finals Preview: The
John McEnroe group

ATP World Tour Finals Preview: The John McEnroe group

Check out the Ivan Lendl group next.

Follow Niko on Twitter: @nikovercelletto