Arsenal boss Mikel Arteta admits they paid for their errors in Wednesday's Carabao Cup defeat to Manchester City.
The Gunners were thumped 4-1 in London, as Gabriel Jesus, Riyad Mahrez, Phil Foden and Aymeric Laporte struck for the visitors.
Arteta said, "Against this level of opponent they penalise you and make it very difficult.
"We have a great counter-attack moment but they then score in an offside position and you end up losing the game again.
"It's a hard one to take considering how the game went. This level of opponent, when you give the goals away it makes the game impossible. A lot of strange things are happening in every game and that makes things really difficult.
"We have to turn it around - there is no question with the fixtures we have it's going to decide our season.
"On the basis of what we have shown tonight against difficult opponents, I have fighters in my team. Yes, I have fighters."
