Allegri said: "In order to improve this squad we need great players and Sneijder is one of them. He is a Galatasaray player and perhaps we have a chance for someone else, but the important thing is to have a midfielder with certain characteristics.
"At the moment we only have five for four roles, so it's not ideal for them to play all the time. I have great midfielders and wouldn't change them for any other team in the world, so to improve the squad there are very few who could really make a difference.
"When we start playing a game every three days and the Champions League returns, we will need more options."