Manchester United centre forward Radamel Falcao is resigned to his stay at Old Trafford being short-lived . Sources close to the Colombian striker now convinced the 29-year-old simply joined the wrong club last summer . Speculation about Falcao ’ s future has been rife as the South American has struggled during a loan spell from Monaco to recapture the form that made him a world superstar . Radamel Falcao ( centre ) in action for the Manchester United Under 21 team on Tuesday . Striker Falcao ( second right ) has often been left on the substitute 's bench at United . Falcao celebrates scoring against Leicester , one of only four he has scored for United since joining . But in the wake of being relegated to United ’ s Under 21 team on Tuesday night , it is understood Falcao realises that his dream of a long-term deal at United is over . Falcao has scored only four times since he joined the club out of the blue on the final day of last summer ’ s transfer window . He was taken off during the home win against Sunderland last month and has not played first-team football since . Falcao ( right ) shakes the hand of United manager Louis van Gaal after being substituted . Falcao 's last appearance for United came in the 2-0 home victory over Sunderland in the Premier League . Falcao ( left ) was said be shocked that he was asked to play for the United reserves on Tuesday . Sources close to him last night revealed his ‘ total shock ’ at being told to report for reserve-team duty on Tuesday night , just 24 hours after being left on the bench as United failed to rescue their FA Cup tie against Arsenal at Old Trafford . Falcao and his allies believe now that United manager Louis van Gaal never had a particular fancy for him and only agreed to take him on deadline day because other targets had proved too hard to get .
Radamel Falcao has only scored four times for Manchester United . He arrived at Old Trafford on loan in a deadline day switch from Monaco . Falcao was made to play for the United Under 21 team on the final day of last summer .