The left-back, who has a half-time substitute, levelled for the Gunners though a stunning volley just four minutes after coming on the pitch.
After scoring the goal, the Bosnian revealed a shirt underneath with the message Nordkurve", which translates as "North Curve". The message was a tribute to the most passionate fans of his former club Schalke – also Koln's opponents in Bundesliga.
Kolasinac shows the Koln fans his Schalke jersey after scoring. pic.twitter.com/ooXHpxT1En
— Arsenal TSN (@ArsenalTSN) September 14, 2017