The Dutch coach saw his team beaten for the third time in eight La Liga matches and slip nine points behind Diego Simeone’s side in the table.
It was a tough night for Barca, who also lost Gerard Pique and Sergi Roberto to injury, and Koeman says his team must improve in all aspects.
“Like any coach, I am responsible. We know we have to improve results and grow in confidence. We are working hard, we have to improve things in defence and attack,” he said.
“I try to put out the best team we have available. The players have done everything to get a result and we have to continue in that way. I am not worried about the league, although we know we need to win games.”
“A team like Barcelona cannot concede a goal in the way we have done. We played well in the first half. We dominated without creating many chances against a team that defends well. If you commit errors, as we have done, it’s even harder to win the game.”
Source | Sport
Barca now return to Champions League action and play Dynamo Kiev on Tuesday before hosting Osasuna at the weekend. The Catalan giants can book their place in the knockout stages with a win in Ukraine.