Carlos Alcaraz and Jannik Sinner clashed in the US Open 2025 final. The US Open 2026 kits for tennis stars Jannik Sinner and Carlos Alcaraz have leaked online, giving fans an early look at what tennis‘ biggest current rivalry will wear when the season’s final Grand Slam gets underway. The US Open 2026 will be played from August 23 to September 13 at Flushing Meadows, New York. Will Carlos Alcaraz play in the US Open 2026? Carlos Alcaraz is likely to play the US Open, as he might return to tennis at next month’s Cincinnati Open.