Advantage Arsenal after Garnacho keeps Chelsea’s League Cup hopes alive

Rosenior refused to blame Sánchez for the errors and said he was responsible for the goalkeeper’s uneasiness on the ball. 

“I think the first goal was disappointing,” said Rosenior. “[But] it’s a team goal. It’s not just on Rob. I’m asking Rob to do things that he hasn’t done before. I said to him before the game, and I made this really clear, when my players make mistakes, I am accountable. That’s on me. 

“He made a save in the second half that was absolutely world-class. That could have put us out of the tie. He will improve in terms of his understanding. He’s had a very good season. There were very, very good moments with him. I’ll stay positive with him, as I will with all the group. My job is to help them, not to blame them.

“That’s Rob’s first game with me. I’ve had two days to work with him. What you’ll know with me is I protect my players. I’m asking him to do things. If he makes a mistake, doing what I’m asking him to do, that’s on me.”

Rosenior also revealed that his squad had been struck with illness before the game, with Liam Delap and Jamie Gittens both missing the match. 

“I want to keep the ill players away from the group so it doesn’t spread,” said Rosenior. “Both of them had really high temperatures. Dangerously high.”

Arsenal manager Mikel Arteta admitted to feeling “not perfect” after his team failed to convert a series of chances that would have extended their lead before Chelsea made it 3-2.

“I have to praise the players for the performance, for the game that we just played against a really good opponent,” said Arteta. “With so much quality on that pitch, we had the feeling at the end after the 1-3 and the very dominant period that we had in that time, that we had two massive chances to score the fourth one and the result would have been very different.

“But in that moment, they had an action, they created a corner, they scored a goal, and’s it’s game on. So that feeling is not perfect but as well we have to value what the team has done again.”