World No 1 Alexander Zverev and second seed Carlos Alcaraz are among the favourites the win the season-ending ATP Finals in Turin - but what do our Sky Sports panel think?
Zverev is a two-time champion at the tournament, having lifted the trophy in 2018 and 2021.
The German is in John McEnroe Group with Ben Shelton, Arthur Fils and Rafael Jodar, while Alcaraz - aiming to triumph at the Nitto ATP Finals for the first time - headlines Ivan Lendl Group, which also features Daniil Medvedev, Flavio Cobolli and Frances Tiafoe.
The action takes place at Inalpi Arena from 15-22 November - live on Sky Sports Tennis - but who do Gigi Salmon, Tim Henman and Jamie Murray think will win the tournament? They pick their winners and surprise packages.
And the winners are...
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He is fresh after his lay-off, full of confidence after back-to-back titles, and he really wants this title.
Altitude and his serve will be very difficult to break. Has experience in Turin and winning WTF.
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I don't think he's played so much tennis this year, and he just won Vienna and Paris. He has never won the Tour finals so that will be a big motivation to get that on his CV.
The Spaniard will win because he is the best player on tour right now. He has improved every area of his game on the hard, and that is now translating indoors. With no Jannik Sinner, it's up to him.
When he plays the way he plays in Paris indoors, he's pretty much unbeatable. That being said Zverev will try to finish on a good note because he's the No 1 player in the world and has won the tournament before.
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Who will be the surprise package?
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He is young with nothing to lose. Just 18 months ago, he was 800 in the world, and now he's a part of the top 10.
He is the quickest player on the ATP Tour to have gone from your debut to the top 10! Beating Gustavo Kuerten by 176 days.
The Frenchman loves the big occasion and is so powerful.
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People might not think he's a surprise package, but he was the last guy to qualify for the Tour Finals, so he's coming in as the eight-ranked seed, but I'm picking him.
I'd also like to see Arthur Fils do something but the conditions might be too quick for him - just a feeling. But he's got a big game, so let's see.
He might have been looking pretty tired post US Open but he is a big-match player and can go on a deep run out of nowhere. The vast majority of his points have come from the four big tournaments this year and Turin has everything he needs to be able to turn it on again for a fifth big run of the year.
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Speaking at the WTA Finals in Indian Wells, former Australian Open champion told
"You have Carlos, who won in Paris, and then you have Ben [Shelton], who was in the finals in Paris and US Open.
"I feel like when you have Zverev as the No 1 in the world, you also have Jodar, who is having an incredible year, and Fils, who won Cincinnati in amazing fashion. The difference between all those players is so much closer."
On the American players, Keys said: "I'm cheering for Tiafoe to have an upset, absolutely. But Shelton is also my guy, and he's playing amazing tennis. Everyone is going to play amazing tennis.
"Both groups are tough."
Stream tennis with no contract on NOW and the Sky Sports App. You can watch the WTA Finals from Indian Wells this week on Sky Sports Tennis.