Following his debonair appearance at the Toronto Film Festival [1] on Friday, Leonardo DiCaprio [2] returned to NYC just in time for the men's final of the US Open. On Sunday, the Before the Flood actor intently watched Novak Djokovic take on Stan Wawrinka at Arthur Ashe Stadium. Dressed in his signature newsboy cap and sunglasses [3], the actor tried to go incognito once again, but a couple of attendees recognized him immediately. Just a day before, Jessica Alba and her two daughters, Honor and Haven Warren, attended the women's final [4] and were as cute as can be as they took in the match from the stands.