Sinner is chasing a 31st consecutive indoor hard-court win but has not played Alcaraz in these conditions since the 2021 Paris Masters, when it was the then unseeded Spaniard who won a tight second-round match 7-6 (7-1) 7-5. It was their first match at ATP level.

Sinner's run of indoor hard-court wins is already the sixth longest in the Open era, with John McEnroe's 47 from 1978 to 1987 setting the benchmark.

The Italian has given some insight into why he loves the indoor matches, saying this week: "You don't have the wind, you don't have the sun. You always have the same feeling on the court. It also helps you to feel more and more comfortable, at least from my side.”

We're celebrating Sinner for making it through to three consecutive finals at this event, but he has an awfully long way to go to achieve a record in that regard, because there is a clear leader in Ivan Lendl, who reached nine straight from 1980 to 1988.

Andy Murray's future coach was representing Czechoslovakia at the time and won five of those finals, which stood as a record until Pete Sampras matched it, with Roger Federer (six) and Novak Djokovic (seven) since going even better.

You may be wishing for a five-set epic today to match the Alcaraz-Sinner French Open final classic.

We're still expecting a spectacular match, but don't expect it to last five hours because this is a three-set contest.

The ATP Finals title match used to be a best-of-five contest, but that ended after 2007, the year Roger Federer swatted aside David Ferrer 6-2 6-3 6-2. The past four finals have each been won in straight sets.

John, who you'll be hearing from later on, didn't see all of the Roland Garros final. He took in most of the first set, then spent the next couple of hours watching his niece perform in a local drama group's production of High School Musical, but was still home in time to watch the sensational closing two sets.

Image source, Getty Images

Image source, Getty Images

But while this final is bucking a recent trend, Alcaraz and Sinner have developed a habit of settling trophies between themselves.

The 'Sincaraz' rivalry has hit full swing in 2025, with this the sixth meeting between the pair in a title match.

Alcaraz drew first blood, winning in straight sets in Rome on Sinner's comeback from a three-month doping ban, before fighting back from two sets down and saving three championship points to win a five-and-a-half-hour epic at Roland Garros.

Sinner produced a comeback win of his own to claim his maiden Wimbledon title before Alcaraz reasserted his dominance with victories in Cincinnati and at the US Open.

Alcaraz leads their head-to-head 10-5 and boasts a 5-2 record in finals.

This match marks the first meeting of number one and number two on the rankings list in the ATP Finals title match since 2016, when Andy Murray beat Novak Djokovic in London to clinch year-end top spot.

That's not on the line today, because Alcaraz wrapped up number one earlier this week by powering through the round-robin stage undefeated.

Image source, Getty Images

Both finalists are extremely wealthy already, so today their priority is the glory and the oneupmanship that comes with lifting the trophy.

But at a time when tennis players are pushing for more prize money, both will surely be aware the pot of $5.07m (£3.85m) for the champion is a record pay-out for the ATP Finals.

They may also be aware that Elena Rybakina won even more earlier this month with her triumph at the WTA Finals in Saudi Arabia, where the former Wimbledon champion collected $5.235m (£3.98m) for her success.

This season has seen both Alcaraz and Sinner push through the $50m (£38m) mark for career on-court earnings.

2025 has been the year of Carlos Alcaraz.

The Spaniard will finish as year-end number one for the second time in his career, has won a tour-high 71 matches, and led the way with eight titles, including triumphs at Roland Garros, the US Open, and three Masters events.

Still only 22, he is through to the ATP Finals trophy match for the first time in his career, dropping just one set along the way.

Jimmy Connors Group - 1st

• Beat Alex de Minaur - 7-6 (7-5) 6-2
• Beat Taylor Fritz - 6-7 (2-7) 7-5 6-3
• Beat Lorenzo Musetti - 6-4 6-1

Semi-finals

• Beat Felix Auger-Aliassime - 6-2 6-4

It's been something of a mixed year for the Italian.

On court, he's won five titles - second only to Alcaraz and the second-most prolific season of his career - including defending his Australian Open crown and a maiden Wimbledon triumph.

But these successes have been overshadowed at times by a three-month doping ban which he accepted in February, with the short length of the ban drawing backlash from some fellow players.

However, there have only been cheers in Turin. Arriving on home soil off the back of titles in Vienna and Paris, Sinner has continued his hot form, not dropping a set or losing a service game to cruise through to the final.

Bjorn Borg Group - 1st

• Beat Felix Auger-Aliassime - 7-5 6-1
• Beat Alexander Zverev - 6-4 6-3
• Beat Ben Shelton - 6-3 7-6 (7-3)

Semi-finals

• Beat Alex de Minaur - 7-5 6-2

Image source, Getty Images

What a match we have on our hands tonight.

A sixth meeting of the season between Carlos Alcaraz and Jannik Sinner.

The year-end number one against the defending ATP Finals champion.

Who will win the trophy in Turin to bring the curtain down on the 2025 ATP season? Stick around to find out!

The players will be out on court at 17:00 GMT.