He said: "It is obvious Carlos doesn't enjoy it. He wants to play. But do I want players who are quite happy to sit in the stand?
"I have to manage that situation the best I can. I understand he wants to play.
"I want to pick a team that wins. I have to be as fair as I possibly can. Performances do matter and his performance on Wednesday gives me a big problem.
"I have been doodling on my pad trying to see how I could fit all these players in, but one of the important parts of your team is a proper balance. I am working on that.
"It was a fantastic performance from the lad on Wednesday, full of energy and aggressive running.
"The lad always tries and I admire him for that, even if it does not make my job any easier."