The former PSG manager had recently come under attack from Arsenal fans over his decision to constantly leave the former Real Madrid midfielder out of his squad.
The 31-year-old has made just two appearances in all competitions for the Gunners this season and has not been included in the matchday squad since September.
“Here, we have one agreed strategy as a club and a team,” Unai Emery said.
“Because the most important thing is the club, the team and finding a performance.
“Previously we were all speaking between us to take that decision. I know all the supporters want to know something but now is not the moment. I think it is not the moment to speak about him.
“We are going to play on Sunday and in the next matches and we are going to decide, and when we can speak about him something differently we will look.”