The Gunners are aware that shot stopper Bernd Leno may want to leave the club this summer.
Fabrizio Romano, transfer expert, the 25-year-old Onana is seen as the ideal replacement if Leno is sold in the transfer window.
Speaking on The Here We Go Podcast, Romano said: "They are in touch with the agent [of Onana].
"They like the player, he's a serious opportunity but it's not advanced or closed yet so now Arsenal will talk with people close to Onana, with his agent, to understand the situation.
"But, it's not done yet."