Manchester United legend Paul Scholes has big concerns over Radamel Falcao's long-term fitness.
The Colombia hitman, 28, underwent surgery on his left knee before the World Cup, which caused him to miss the tournament.
Falcao damaged an anterior cruciate ligament in January while playing for Monaco in the French Cup.
Scholes told the Daily Star: "You just hope his knee is right, I think that will be the main problem.
"But once he gets going and [Angel] Di Maria can start creating chances for him then I'm sure we will start scoring goals.
"Falcao's goalscoring record is brilliant from when he has been at Porto and Atletico Madrid. The goals he has scored have been important, then there is the movement he brings and his experience as well at 28 years of age."
