Atletico won the first-leg 4-0 last night, with all four goals coming before halftime.
Deco remarked afterwards: “The first half was tough. The pitch wasn't helping us, but that's no excuse. In the second half, we improved, we won more balls. Then we could have made it 4-1 with (Pau) Cubarsí's (disallowed) goal.
"I don't know if it took them ten minutes to find out there was an offside . But that's no excuse. This team has shown before that we can come back. For now, we have to focus on the league.
"If we play with the necessary intensity, we can try to win in Girona , but if we play like we did in the first half, it will be difficult."
He then insisted on pointing the finger at the players, stating: “It’s a question of intensity. Atlético has great players, they’ve improved with their winter signings; and we didn’t approach the first half as we should have, but this is only the first leg of the tie and we’ll see what happens.
"There have been spectacular comebacks at the Camp Nou. Playing at home, with a better pitch than on Thursday, we have to try to win.”