Norwich City Head Coach Daniel Farke says his side's mistakes in front of both goals were behind their 4-0 defeat at Arsenal on Wednesday evening.
"We know that on this level we have to be at our top level in order to be competitive, especially after playing 120 minutes against Man United in the cup and have just one centre-back available," he added.
"Sadly, we made too many mistakes, especially in front of the goals. Arsenal were the better side in terms of scoring goals. We have to accept the loss because we didn’t reach 100 percent the level of performance and made crucial mistakes before the goals."
One player who has barely set a foot wrong all season is Tim Krul, but it was his error that led to Pierre-Emerick Aubameyang opening the scoring at the Emirates.
"Tim is always self-critical, but he’s played a fantastic season so far and is so important for us," Farke said. "I’m totally happy with him and that we have him. Even he has the right to make mistakes.
"It didn’t help us because the first goal is always crucial. After that, we felt too sorry for ourselves and that’s why Arsenal were able to score the second goal.
"We were close to showing a reaction at the start of the second half but Martinez was there with some really good saves. We were close to scoring to get back in the game, but assisted their third goal.
"After that, the game was over and it was more about making sure that we didn't concede more goals."
Three substitutions at half-time suggested Farke was convinced that changes needed to be made, and the fresh legs helped the Canaries carry the ball forward and shoot on sight with more hunger than they had done in the first half.
"It's understandable that we felt a bit sorry for ourselves, but we needed to have the same aggresiveness and belief, so I wanted to bring that back with a change in formation and players to bring fresh energy on the pitch," Farke explained.
"We were totally on the front foot, dominating the first 15-20 minutes and had some good chances with Adam Idah.
"There was a penalty situation with Todd as well. When we conceded the third, the momentum wasn't on our side.
"We don't have any arguments after a 4-0 loss. We decided to be self-critical, stay humble and speak about what we have to improve in order to play the next game at our top level and without mistakes."