Alexander Zverev’s US Open title run has tightened the race at the top of the ATP Tour rankings, leaving Jannik Sinner with a much smaller cushion than before. Sinner did not compete at the US Open, while Zverev made full use of the opportunity, defeating Ben Shelton, Karen Khachanov, and Botic van de Zandschulp on his way to the trophy.

The German’s second Grand Slam crown has lifted him to within 1,810 ranking points of Sinner as the season moves into its decisive phase. That gap may yet shrink further, especially after Sinner confirmed his place in the Vienna Open, the ATP 500 indoor event scheduled for October 24 to November 1.

Sinner is the defending champion in Vienna, and his decision to return there underlines how important ranking points have become in the battle to keep hold of world No. 1. He is defending 3,550 points between now and the end of the season, while Zverev has only 1,040 points to defend.

Sinner’s recent history in the closing weeks of the season supports his position. Last year he won the China Open, the Vienna Open, the Paris Masters, and the ATP Finals, showing his strength on indoor hard courts. Even so, there are concerns around his current condition. He has not played since Wimbledon because of a knee injury, and that absence could make it harder for him to immediately hit top gear again on the ATP Tour.

His schedule also includes the China Open and the Shanghai Masters, two tournaments that are known for difficult heat conditions. Sinner has previously struggled in the heat and came close to retiring at the Shanghai Masters last year before losing to Tallon Griekspoor.

Zverev, meanwhile, is producing some of the best tennis of his career. His confidence, built on a two-time Grand Slam-winning season, could carry him through the rest of the year. He has also been a strong performer on hard courts, having won the Vienna Open, the ATP Finals, and the Chengdu Open on this surface in the past. With both men under pressure, the fight for No. 1 looks set to stay close.

Carlos Alcaraz’s return to competition at the US Open offered plenty of encouragement, even if his campaign ended with a five-set defeat to Ben Shelton in the quarter-finals.

The Spaniard arrived in New York under a cloud of uncertainty after spending four and a half months away from tennis following a wrist injury sustained at the Barcelona Open. Questions about whether he could quickly find his highest level were understandable, but they faded fast as he moved through the early rounds with authority.

Alcaraz defeated Roman Safiullin, Jaime Faria, Wu Yibing, and Tommy Paul to reach the last eight, losing only one set along the way. That kind of progress confirmed that his return was far stronger than many had expected.

The harder work now comes after the US Open. His calendar includes an exhibition appearance at the Laver Cup, the Six Kings Slam, and the ATP Tour’s Asian swing. It is a demanding run at a stage of the season when Alcaraz has not always produced his best tennis, and that trend will matter if he wants to keep closing the gap on Alexander Zverev and Jannik Sinner.

At present, Alcaraz is closer to Ben Shelton in fourth than he is to Zverev in second, and history suggests that may still be the case by the end of the 2026 season.

The closing months also carry another obstacle. Alcaraz has not yet won either of the final two Masters events of the year, the Shanghai Masters or the Paris Masters. His record in Shanghai is limited to three appearances and a best showing of the quarter-finals in 2024. Paris has been even less kind, with two second-round exits, including last year’s loss to Cameron Norrie, plus two third-round departures. Across five appearances there, he owns a 50% winning rate, which makes it his weakest Masters event by some distance.

Between the end of the US Open and the close of the season, Alcaraz has won only two tournaments, the China Open in 2024 and the Japan Open in 2025, both ATP 500 events.

Alexander Zverev has added another major milestone to his strong 2026 campaign, winning his first US Open crown after a four-set victory over Ben Shelton. The German’s plan was executed with authority, and the home crowd at Flushing Meadows was left to drift out in disappointment as the final unfolded.

The result gave Zverev his second Grand Slam title of the year, a figure that stands above the rest on the men’s side in 2026. That followed his first major triumph at Roland Garros in June, a breakthrough that already marked this season as the most productive of his career at the biggest events.

With the US Open now complete, attention naturally turns to the world No 1 ranking. Zverev sits just 1810 points behind Jannik Sinner, making the gap narrow enough for the race to remain alive heading into the closing stretch of the season.

Boris Becker, Zverev’s compatriot, suggested the timing may be close to decisive. Writing on social media after the US Open title was secured, Becker said: “Think Sascha is gonna take it by the time Turin comes along.”

That reference points to the ATP Finals in Turin, the season-ending event for the eight highest-ranked players in men’s tennis. Zverev, Sinner, and Carlos Alcaraz have already secured their places for the tournament, which begins on 15th November.

The German has a particularly important window ahead, especially with Sinner managing injury concerns. The Italian’s knee ruled him out of the US Open and he is expected back at the China Open, which starts on September 30th.

There is also a significant points dynamic at play. Sinner is defending 3550 points before the season ends, based on titles at the China Open, the Vienna Open, the Paris Masters, and the ATP Finals in 2025. Zverev, by contrast, has only 1,040 points to protect and did not win a title during this stretch last year.

That leaves Zverev with a clear opening before the ATP season closes. He returns to action at the Laver Cup from September 25th to 27th, where he will represent Team Europe alongside Alcaraz, Jakub Mensik, Flavio Cobolli, Rafael Jodar, and Casper Ruud against Team World.