Ozil was again criticised after victory at Cardiff City on Sunday, but Emery declared he was happy with the German's workrate.
“I think today in the second half Mesut played a good match because he worked every minute that he was on the pitch," said Emery.
“Maybe with the control and possession [we had] in the second half, and the positions on the pitch, he feels better on the pitch.
“I want to give every player the same condition and every player is very important. With Ozil and his quality, I think we need… his quality for the team."