Romelu Lukaku warns his teammates of Man Utd after the defeat of Barcelona

Romelu Lukaku admits that Manchester United will have more trouble organizing a successful return to the Champions League against Barcelona than they met against Paris Saint-Germain.

United booked their place in the quarter-finals of the Champions League with a remarkable 3-1 victory over PSG last month and was rewarded with a tough match against Barcelona.

But Ole Gunnar Solskjaer's team is facing a new battle after Barca left Old Trafford on Wednesday night with a 1-0 win after Luke Shaw's first-half goal.

United was not able to put the shot in his clash with the Spanish champions, and Lukaku said his team needed to show a clear improvement in the return leg at Camp Nou next week.

"The Barca are not PSG, they have more experience," Lukaku told COPE.

"We have to be confident and go to Camp Nou with pbadion and generate more chances.

"We lacked confidence with the ball and I hope we play better next week."