Donald Trump was not a welcome figure at the 2025 US Open. The controversial president made his way to Arthur Ashe Stadium in New York on Sunday to see tennis champs Carlos Alcaraz and Jannik Sinner face off... But the real rivalry was between him and the rest of the crowd. Or the world, we guess... Related: Trump Attacking TOM HANKS Now?!? Seriously??? When the US President stepped foot in the Rolex box suite to wave to the stadium, he was met with an overwhelming, booming, roar of boos coming from the 24,000 attendees.