The Ivory Coast winger kept his place in Arsenal's side despite being criticised by manager Mikel Arteta following his red card in the goalless draw at Leeds on Sunday.
Fast-forward four days and the club-record signing made amends by shining as the Gunners won 3-0 in Norway with teenage forward Folarin Balogun grabbing his first senior goal after Reiss Nelson had doubled the lead.
The result means Arsenal are through to the round of 32 and can assure themselves top spot in Group B with a positive result at home to Rapid Vienna next week - a game which will see 2,000 supporters return to the Emirates Stadium for the first time in nine months.
This weekend get a £10 free bet with Betfair, when you bet £10 on a Same Game Multi on the Premier League.
Terms: Min £10 Same Game Multi bet on any EPL match this Fri - Sun. Free bet valid for 72 hours, awarded at bet settlement. Excludes cashed out bets. T&Cs apply.