Arsenal managed only a 0-0 draw with Sporting Lisbon here, but the single point was enough to guarantee them a spot in the Europa League's round of 32.
With 10 points, Arsenal lead Group E by 3 points over Sporting. The other two clubs, Vorskla and Qarabag, have 3 points apiece and are out of contention, reports Efe.
The most dramatic moment of an otherwise quiet Thursday night at the Emirates Stadium came in the 25th minute as Arsenal's Danny Welbeck was injured in a hard landing after winning a header.
Medics gave the striker oxygen before carrying him off the pitch on a stretcher.
Sporting went down to 10 men in the 87th minute with the ejection of Jeremy Mathieu on a straight red card for fouling Pierre-Emerick Aubameyang in the area.