Theo Walcott has highlighted what concerned him most with Arsenal's defeat by Newcastle in the Carabao Cup.
Mikel Arteta's side have been left with a mammoth task if they want to reach the final of the competition after losing 2-0 at the Emirates in their semi-final first leg tie on Tuesday night.
Goals from Alexander Isak and Anthony Gordon mean the Gunners must go to St James' Park and overturn a two-goal deficit to set up a final against either Tottenham or Liverpool.