"We need to keep calm," he is quoted as saying by Sky Sports News.
"I think the manager (Manuel Pellegrini) is clever enough to work during the week and show to us on video what we did wrong and try to do well next game.
"We need to think and be positive now and review the game, just to see all the mistakes and try not to make them again. Sometimes when you lose one game it is terrible, but we must be stronger than ever."
City continue their Premier League campaign on Saturday when they face Norwich City at Carrow Road.