Manchester United defender Chris Smalling drew positives from defeat to Barcelona.
A Luke Shaw own goal separates the teams going to Barcelona for the second-leg of the Champions League quarterfinal.
Smalling said, "We pressed them high and made it difficult. It's a shame we couldn't get the goal. I thought we created some good chances.
"We had a spell in the first half where we went after them and then we looked nervy, but after half time we got at them.
"The whole team, we nullified them. I think there was only one other save for David de Gea. We knew we had to bring that intensity that they're not used to.
"It was a good battle, my yellow card on Luis Suarez out of all the challenges I thought it was the softest."