This is Jannik Sinner's towel from the 2025 Wimbledon Final, where he defeated Carlos Alcaraz in the final. After our consignor received the towel from Sinner it was then signed by Sinner. 

Consignor statement:

"I attended the 2025 Wimbledon finals and was seating behind the players’ chairs. 
At the end of the match, after the players speech, when Sinner gathered a few of his stuff he handed me the towel and signed a few autographs - that’s also when he signed it. We cheered for him during the match, quite vocally, so it was nice of him to give us the towel at the end."