Pep Guardiola says it would be a "big mistake" for Arsenal to sack manager Mikel Arteta after Manchester City's 4-1 win over the Gunners in the Carabao Cup quarter-finals on Tuesday.
Arsenal are without a win in eight domestic league and cup matches.
Arteta left City, where he was Guardiola's assistant, 12 months ago to take charge at Emirates Stadium.
"I'm pretty sure they are going to trust him," said Guardiola when asked if Arsenal need to stick with Arteta.
"They will do a big mistake if they are thinking [of dismissing him]."
Arteta said on the eve of the last-eight tie with City that he has no plans to walk away from his job and feels he has the support of the club.