If the Italian captures the title on Sunday, he'll take the top spot back from Carlos Alcaraz on Monday.

The pair's two prior 2025 meetings went the distance, but Saturday was a completely different story.

He's also a win away from the biggest title of his career.

Felix Auger-Aliassime can overtake the Italian for No. 8 in the race Saturday, with Daniil Medvedev also in the picture to shake things up.

This will be the second consecutive year she's finished at No. 1, but this time she held the top spot from start to finish.

The Canadian reached his 10th tour-level semifinal of the year, while ending the wild card's 10-match win streak on the Masters 1000 stage.

Singles action kicks off in Riyadh with Iga Swiatek and Madison Keys facing off in the Serena Williams Group.

Power, individuality and high fashion were on full display in Riyadh.

Who can stop Aryna Sabalenka in Riyadh? The TENNIS.com team makes their predictions.

Will someone finish 2025 with two of the five biggest titles, or will we have different winners at the five biggest events?

The Italian revisits his skiing roots in Gucci’s Altitude campaign, which blends high performance with high fashion ahead of the 2026 Winter Olympics.

The American has lost his last six matches—and 15 sets—to the Italian. They meet again on Friday, at the Rolex Paris Masters.

"I’ve known her for such a long time, so that made it a little emotional."

He secured his spot in Turin with his 55th win of the year, second only to Carlos Alcaraz for most wins for a man this season.

Among his highlights this year are reaching the semifinals of the Australian Open, winning his first Masters 1000 title in Toronto and breaking into the Top 10 on the ATP rankings.

All former Top 10 players, they also couldn't be more different in how they've cultivated success, or tackle challenges on the court.

The Shanghai title holder advanced to the quarterfinals, 7-6 (4), 6-4.

Our team of Tennis Channel analysts draft their 2025 WTA Finals fantasy teams.

After capturing her biggest career title at home, the Spanish-American teen followed up with another strong run in Germany.

Coco Gauff and Amanda Anisimova attend the official ceremony, while defending champion Iga Swiatek explores the city and joins a Special Olympics clinic.

The rising star dethroned Joao Fonseca as the youngest ATP Challenger champion this year with his first title, in the youngest Challenger final in more than 20 years.

Reacted the No. 13 seed, "He said that he will do everything to send me home. It’s nice that he lives in Paris and it’s not too far with the taxi."

He joins Carlos Alcaraz, Jannik Sinner, Novak Djokovic and Alexander Zverev in the elite eight-man field.

After Carlos Alcaraz's opening loss to Cameron Norrie, Sinner can reclaim the top spot by winning the title.

A select field and thrilling format make these season-ending championships must-see events.

World No. 1 Carlos Alcaraz, defending champion Jannik Sinner and seven-time winner Novak Djokovic lead the  field in Turin.

The 34-year-old earlier won his first singles match since Wimbledon and played doubles with the retiring Nicolas Mahut.

Our Matchup Mindset series reveals the psychology behind two of tennis’ most unpredictable champions.

With nine successive 1000 main-draw wins, the Monegasque might be the favorite to come through a wide-open section of the draw.

The Italian will return to the top spot if he wins the title this week. It may only be temporary, though.

The Frenchman, winner of five doubles majors and one half of the longest tennis battle in history, played his final match Tuesday alongside Dimitrov.

The result snaps the world No. 1’s 17-match winning streak at the ATP Masters 1000 level—a run dating back to April.

Looking at the field in Riyadh, it’s clear that resilience was the under-the-radar theme on tour this season.

Out of the Top 450 in April, the one-time Texas A&M standout has bounced back from left foot surgery with a strong push on the ATP Challenger Tour.

Sabalenka is joined by Coco Gauff in the Stefanie Graf Group, while Swiatek competes alongside Amanda Anisimova and Madison Keys.

Introducing "Matchup Mindset," an exclusive, 15-episode series that goes inside the minds of the game's greats.

The Monegasque rising star won his first match since claiming a stunning Masters 1000 title.

The world No. 1 was asked for his thoughts on the "ideal number" of matches a top player should play in one season ahead of his opening match at the Rolex Paris Masters.

The No. 13 seed begins his Rolex Paris Masters campaign with confidence, and a fresh perspective heading into season’s end.

The 34-year-old eased past Mpetshi Perricard, 7-6 (5), 6-1.

In addition to the increase in prize money, the calendar will expand from from 216 to 265 events next year.

Recapping all the action from a jam-packed week on the ATP Challenger Tour.

Rubin and fellow Tennis Channel Analyst Jan-Michael Gambill also tagged defending champion Coco Gauff as one to watch in Riyadh.

These half-dozen siblings of more marquee models might not top the marketing charts, but they share much of the same DNA.

Fritz, Shelton, De Minaur and Musetti are holding steady at No. 5 to No. 8 in the race, but a lot of points are on offer this week.

Also, Alejandro Davidovich Fokina and Linda Noskova make their Top 15 debuts, and American Ann Li cracks the Top 40.

He's just the eighth player in ATP or WTA history to hit that number, and the second player born in the 2000s to do it.