Watch: Jannik Sinner works on his serve without a racket!

World no. 2 Jannik Sinner is back on the practice court following the US Open final defeat to Carlos Alcaraz. The Italian is putting extra attention on a detail that could shape his closing stretch of the season.

The four-time Major champion has been working on his serve at the Monte-Carlo Country Club. Instead of his usual drills, the 24-year-old rehearsed the motion without a racket, seeking fluidity and precision in an area that proved costly in New York. 

Jannik was unhappy with his serving performance at Flushing Meadows, especially in the title clash against his greatest rival. Thus, the hard-working Italian seeks essential improvements ahead of the Asian swing.

At the Monte-Carlo Country Club, Jannik Sinner is working on his serve — this time without a racquet.
A key element that let him down at the US Open, especially in the final.
Sharpening every detail as he prepares for the season’s closing stretch. 🦊🎾

pic.twitter.com/tkz059ho8r

— The Sinner Times (@sinnertimes) September 16, 2025

Sinner spent 65 weeks on the ATP throne between June 2024 and the recently ended US Open. He has won two Major titles this season, extending his incredible consistency but losing four notable finals to Alcaraz. 

As we already said, his initial shot did not work well against the Spaniard in the US Open final. Now, Jannik looks determined to turn that weakness into a strength, focusing on the mechanics behind the serve and aiming to refine rhythm and placement.

Sinner’s initial shot worked well against Alcaraz in the Wimbledon final, keeping the pressure on the other side. However, the Italian could not repeat that in the Cincinnati Masters final after struggling physically.

Carlos Alcaraz & Jannik Sinner, US Open 2025© X – Roland Garros

He and Carlos met in their fifth final since May in New York, and the younger player earned a convincing 6-2, 3-6, 6-1, 6-4 victory in two hours and 42 minutes. The El Palmar native learned his Wimbledon lesson. 

Alcaraz faced only one break point, and it cost him the second set. However, the pressure was on the Italian in the remaining ones. Jannik lost 42% of the points in his games and offered his rival 11 break chances. 

Carlos seized five to control the scoreboard and move over the top in style. Their next duel could come in the Shanghai Masters final, and the Italian is working hard on bringing necessary improvements.