Wayne Rooney has admitted he was worried by the reaction of United fans when he returned to action on Saturday.The striker came on as a second-half substitute in the 2-0 defeat of Wigan to make his first appearance since he announced he wanted to leave Old Trafford before signing a lucrative five-year extension."I've been out for a long time," said Rooney, who is set to start for the Reds in tomorrow night's Champions League clash at Rangers. "I'd be lying if I said I wasn't worried about the reaction from the fans but the reception was brilliant and I just tried to help the team win and score goals."I can understand fans' frustrations with the contract negotiations, obviously it happened in the public eye which made it more difficult. But at the end of the day the main thing for myself and the club is that we managed to agree that deal."I've signed a new deal to stay here and my long-term future is at United."The England striker also scotched suggestions that some of his United team-mates had been giving him the cold shoulder following the episode."The players have been fine," he said. "There's no problem whatsoever since the negotiations, not before or after."I always made it aware I wanted to be at this club. I had my concerns and voiced my opinion but at the end of the day I'm delighted that my long-term future is at United,"I want to to help the young players the way Giggsy, Gary Neville and Scholesy have helped me. I want to be here and to continue to make this club successful."