The 23-year-old defensive midfielder completed a short-term loan-deal to the Addicks on Monday, signing until December 1.
Coquelin, a former France Under-21 international, has made 44 senior appearances for the Gunners, although, having spent last season with SC Freiburg in the Bundesliga, he had made just a solitary League Cup appearance for the North Londoners this term - leading him to move south to sign with the Championship side.
He was eligible for Charlton’s fixture with Leeds United on Tuesday evening, and he entered the field of play on 61 minutes, winning two tackles and impressing with his pass accuracy and calm presence in the midfield position.
Coquelin will be looking to use his spell with Charlton as a way to break back into the Gunners first-team, and Addicks boss Bob Peeters commented after the game on how he thought the Frenchman had performed on his debut.
Speaking to the official Charlton website, Peeters said: “I think he showed a bit of quality. We brought him on because Jordan Cousiins and Yoni Buyens had a yellow card and I was worried they would get a second yellow and leave us with 10 men.
“I think Coquelin showed that he is a good player and his work ethic is very good.”
Having impressed just one day after signing for the South London club, Peeters in confident that Coquelin can continue to improve for the Addicks.
He added: “That’s [work ethic] very important and he can only grow once he gets to know the boys and the system we want to play.”
Coquelin will be looking to make his first start for Charlton on Saturday, with the promotion hopefuls traveling to Reading.