Radamel Falcao loan can be terminated if he gets another injury to troublesome knee

 Manchester United can return Radamel Falcao to his parent club Monaco if he gets a recurrence of the knee injury that ruled him out for much of last season.

The Colombian striker moved to Old Trafford on a £6million loan deal this transfer deadline day, and is earning almost £300,000-per-week. 

But United have sought to make sure this investment isn't wasted, ensuring a clause in the deal that allows them to terminate the loan if his injury returns.

The club tested their new striker rigorously during his deadline day medical, and although they were satisfied with the results, the club felt the need to add in the clause for extra protection. 

Falcao missed this summer's World Cup after tearing his anterior cruciate ligament playing for Monaco in January. 

The 28-year-old made his United debut off the bench against QPR last weekend, and could start for his new club for the first time at Leicester on Sunday.