In November last year, it was reported that Antonio Valencia had picked up a minor hip injury and could be out of action for a week (via ManUtd.com).
Sir Alex Ferguson said at the time: "He's had a bit of pain there for the last couple of weeks but he's been playing with it. That's the type of guy he is. He never mentioned it and plays on."
Having been a regular starter through the months leading up to the knock, Valencia was subsequently seen less and less.
He made only two appearances in January—both from the bench—while starting just a couple of games in February.
His horrific broken leg suffered in 2010 could also be rearing its ugly head again.
In an interview with The Mirror, the man himself revealed: "The injuries I've had have held me back a bit. I still get the odd twinge from the last injury I had to my leg and that perhaps affected my progress slightly" (h/t Sky Sports).
These problems don't seem to want to go away and could be a key reason for his drop in from.