Asamoah Gyan aims to spoil Christmas for the club he supported as a boy when Sunderland visit Manchester United on Boxing Day.The Ghanaian striker has been in sensational form since joining the English side from French side Rennes in August.Now Gyan says he wants to stop the team he supported as a child when they clash on Sunday in the Premier League.“I’ve been waiting for this for a very long time,” said the Ghanaian international.“I supported Manchester United since I was a boy and my hero was Eric Cantona.“I hope I can score there because although I’m a Man U fan I’m doing my job. I have to stay positive so we’re going there to win. Maybe I’ll try and swap shirts – definitely it will happen. I don’t know whose shirt, any player.“I liked United because they played good football. I liked Eric Cantona because he was a great player, his personality and everything.“My dad was a Man U fan for many, many years. His favourite player was Gary Pallister, because he played in defence.”Sunderland’s £13 million club-record signing may have strengthened United’s title challenge by helping his club beat Chelsea 3-0 at Stamford Bridge and he is optimistic of repeating the upset.“Now I think teams will be wary of taking on Sunderland because Sunderland look very dangerous,” Gyan added.“We are saying if we can do it at Stamford Bridge, we can do it at Old Trafford. We do respect Manchester United, but we are also capable of going there and picking up a win.”Source: Ghanasoccernet.com