Cech will be in goal for the Europa League final against Chelsea, as he bids farewell to a long and storied career in the game.
Emery has confirmed that a decision about who starts in goal has already been taken, with Bernd Leno missing out on a starting spot.
He said on the situation in goal to reporters: "(Cech's) here because he deserves to be here. His commitment to Arsenal is big. He was playing the last (Europa League) matches, perfect matches, with big performances. I want to enjoy with him this final in his career.
"I'm a privileged coach to be with him. We're going to use all our effort to win and to be together and enjoy this final together.
"I trust and believe in him. I can use him, I can use Leno, but above all I want to enjoy this with the players, and (what is) a special moment for some players.