Manchester United made it “too easy” for Barcelona in their Champions League quarterfinal first leg on Wednesday night.
The Blaugrana secured a vital 1-0 away win at Old Trafford despite playing below their best football.
And Lindelof thinks United should have taken advantage by pushing the visitors.
“It’s a tough game, we played against a really good team,” he told Sky Sports. “At times we performed well, at times we didn’t.
“We still have a game to go so we’ll have to look back at this game and see what we could have done better. I’m just angry that we didn’t get a better result, but that’s football.
“When you play against teams like this, you can’t concede goals like that. It is too easy.
“It happened, we just have to learn from it and move on.”