And now it seems United have also shown an interest in the Colombian as Louis van Gaal continues to strengthen his struggling team. Wayne Rooney has not yet fired on all cyclinders while there are fears Robin van Persie will never be the same player he was after a run of injuries. Danny Welbeck is on his way out - if United can find a buyer - and Inter Milan want Javier Hernandez, leaving Van Gaal short of options up front.