U.S. Open runner-up Novak Djokovic insisted in a post-game interview that he and Maria Sharapova are only friends, after she was spotted cheering for him in his box at Arthur Ashe Stadium. But The Post's Braden Keil reports that the two showed up together that night at Wakiya in the Gramercy Park Hotel. They mostly missed the opening-night party for the chic Chinese eatery and such celebs as Robert De Niro, Simon Le Bon, Donna Karan, Jeremy Piven, Beth Rudin DeWoody and Nobu Matsuhisa. But Djokovic and Sharapova then went to the lounge above Downtown Cipriani, where they sang karaoke duets until 5 a.m. to tennis pros Heinz Haas and Tim LoBello and models Ana Beatriz and Elsa Benitez.
Maria Sharapova helped Novak Djokovic get over his U.S. Open final loss to Roger Federer Sunday by hitting Unik's karaoke party at Downtown Cipriani. Feeding rumors of romance, the tennis duo dueted on "Love Is in the Air." (The cozy pair partied into the morning with Stavros Niarchos, Michelle Rodriguez and Roberto Cavalli.) Elsewhere around the tennis courts, Chris Everett and Greg Norman seem to be freer with their affection now that the golf god's multimillion-dollar divorce is wrapping up. The couple held hands Sunday at the Open.