Barcelona midfielder Ivan Rakitic insists they won't be underestimating Champions League opponents Manchester United.

The two teams will meet in the quarterfinals.

"You have to know your best side," the Croatia international, who has spent five years at Barcelona, told GQ. "And the new Man United manager seems to know that.

"If you have to fight a bit more or play counterattacking then you do what is best.

"A lot of teams would like to play like Barcelona and have possession. But if you have possession and you lose the game finally, then it's for nothing and I would not be happy."

He added: "Man United is having good results and to score three goals in Paris was incredible. You have to respect Manchester for this comeback, for the organisation and fight in the team with so many young players."