The Colombian star stole the transfer deadline day headlines in September when he completed a big money loan move to Old Trafford from Monaco after being linked with a host of top English and European clubs.
Despite having a proven goalscoring record from his time at Porto and Atletico Madrid, the 28-year-old has been dubbed a risky acquisition after missing the majority of 2014 with a serious knee injury.
He has since dipped in and out of the United team, with his only goal for the club having come during the win at home to Everton.
The South American has missed United’s last two outings amid fitness worries, and Scholes believes that the situation is a worrying one for his old side:
“From United’s point of view, they will be concerned with Radamel Falcao.” he wrote in The Independent.
“He has not been able to get that run of games together to get match-fit and start scoring goals consistently.
“He scored against Everton, was taken off and did not start against West Bromwich Albion.
“Then he was injured for the Chelsea game. It has been a stop-start beginning to his career at United.
“He needs that run in the team to build his confidence, his performance levels and his fitness.”