Cech, 36, insisted he is comfortable with a new style of play under Emery which places an emphasis on playing out from the back. "[But] If Bernd starts, I believe in him also".
"For Saturday, the decision for me is easy".
"We are going to play away but we need to keep our personality, keep our mentality", added Emery.
Alexandre Lacazette may not have said anything in public, but he's definitely smarting after being benched for Arsenal's Premier League opener and the forward's been practicing his free-kick skills ahead of Saturday's mammoth clash against Chelsea.
Arsenal's Spanish head coach Unai Emery gestures to Arsenal's German midfielder Mesut Ozil (L) on the touchline during the English Premier League football match between Arsenal and Manchester City at the Emirates Stadium in London on August 12, 2018.More news: Kofi Annan, former UN secretary-general, passes away at 80
More news: Google Coach: Google's new health system for Wear OS revealed in leak
More news: Tottenham want to delay Man City game, host at Wembley - Mauricio Pochettino
"That was a good thing, despite us losing 2-0". Maybe if the opposition is doing high pressing against us, then we need also to find another option and to play the ball long in the second action. I want in each moment to know what is our best action to do in the match.
Emery will be without another left-back Sead Kolasinac until October due to a left knee problem, the club confirmed on Thursday. Against City as well, I think he played well also.
Arsenal won, with the scoreline believed to be 4-0, and the game was set up following a simple phone call between the clubs at Emery's request.
"Yes, he is OK every day and is training good". New addition Stephan Lichtsteiner or Nacho Monreal is expected to fill in their void as the North London side will hope to turn around their winless run at Bridge since 2011.