"To lose 1-0 like that, right at the end, is a tough blow to take. But we will bounce back for the Champions League, if we play like that we will beat Barcelona," Kuyt said.
He added, ""We showed we are better than them, so it was very disappointing to lose like that. I feel that they will now win the title. They have shown that they are the best in this competition."
The Reds are 2-1 up from the first leg at Camp Nou, with a clear advantage going into the second leg at Anfield on Tuesday.
"If we show the level of skill and effort we did against Manchester United, I have no doubt that we will win against Barcelona and go into the quarter-finals."