By
SABC Sport
26th February 2025
Barca looked comfortable with a 4-2 lead heading into the final stages of the contest but an 84th-minute strike from Marcos Llorente and a stoppage-time goal from Alexander Sorloth earned the visitors a draw at the Olympic Stadium.
The teams will meet again in the second leg at the Metropolitano in Madrid on 2 April, with the winner facing either Real Madrid or Real Sociedad in the final.
Flick said in his post-game news conference: "Some time after the end of the match it's still not easy to find the right words.
"At the end, we are really disappointed about the result, but the game we played today was really great. I focus more on this, to keep the confidence very high, but also we have to speak about the goals, because it could not be.
"It was maybe too easy [for Atletico]. The fourth goal I am really angry about that. There is no pressure on the ball. This is not how we do it.
"We are young team, we have to improve. Of course it's not the best result, but we have one match more and I think we are able to win there."
Julian Alvarez and Antoine Griezmann netted within the first six minutes to give Atletico an explosive but Barca fought back impressively with goals by Pedri, Pau Cubarsi, Inigo Martinez and substitute Robert Lewandowski.
Flick added: "I think we dominated for 75, 80 minutes. I am very satisfied with this, how we played, how we came back. The mentality is fantastic.
"With the ball, this is for me the most important thing, I really like this. We are on a good way. So the focus is on the future and very positive."