Barcelona Transfers: 10 Players They Must Sign This Summer

All these attacking players sound great in theory, but Barcelona weren't exactly short of flair this season, and they still conspired to get knocked out of the Champions League by a team with only a fraction of their budget.

What they really need is a commanding presence at the back. A player capable of filling the defensive void left by Javier Mascherano in the short-term and, perhaps eventually, take over from the ageing Gerard Pique.

Admittedly, that'd be a hell of a burden to place on the young shoulders of Matthijs de Ligt, an 18-year-old Ajax centre-half who is still some way short of his 100th game at club level.

Mind you, if Barca don't snap this kid up, one of their European rivals almost certainly will. He's practically destined to be one of the world's leading defenders, and having been reared in the Netherlands, he's more than capable of handling the ball in tight spaces too.