Juventus defender Giorgio Chiellini says they cannot allow Barcelona a sniff in the second-leg of their Champions League quarterfinal.

Juve go to the Nou Camp defending a 3-0 lead.

But Chiellini warned: "They are like sharks: they sense it, they smell blood. We have to keep them far from the goal.

"We must slow Barcelona's play, not give them space.

"If we can score, it'll give us an injection of confidence..."