Carlos Alcaraz Celebrates US Open Win With Champagne, After Party With Models

Carlos Alcaraz celebrated his US Open win on Sunday in epic fashion ... first, he doused himself in champagne -- and then he hit a New York hot spot and partied with models!! The 22-year-old Spaniard beat Jannik Sinner 6-2, 3-6, 6-1, 6-4 at Arthur . . .