Oxlade-Chamberlain has been struggling with a groin problem, while Bellerin has an ankle niggle.
"There is some uncertainty about Chamberlain. He has an inflammation of the groin," Wenger said.
"Oxlade-Chamberlain and Bellerin will both have tests today, and Bellerin should hopefully be available."
Wenger has confirmed Welbeck is out and has yet to resume full training.
He continued: "Danny [Welbeck] hasn't returned to training and needs two more games to be back again. He's not back in full training yet.
Wenger also refused to put an exact timeframe on Serge Gnabry's return.
He added: "Serge [Gnabry] is back in full training but he needs games in the the U21s to regain full fitness."
