Before Saturday's match, Arsenal had held a half-time on only three occasions in the league this season and had won 12 points from losing positions - only Leicester City have more.
After losing their first two league games to champions Manchester City and Chelsea, Unai Emery's reign as Arsenal manager went smoothly and they did not taste defeat again until December 16 - a run of 22 matches unbeaten in all competitions.
"I am very happy".
"A clean sheet is another thing we want before every match but we spoke about a lot of things about the match and the win is the first thing".
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"Every player worked very well and the last action, unfortunately for us they scored and also maybe they deserved it". Arsenal kept five clean sheets in the group stage, and haven't yet conceded a goal on the road in the competition.
He said: "Yes, I think we should have had more situations to score more goals, but we played against a strong team today in the second half".
"We still have to believe we can finish in the top four even while knowing it will be hard for us".
"But we can and day 26 we are on our way".
The Gunners now sit fifth, a point off Manchester United in fourth.
Ozil recovered enough to take part in training on Wednesday but Emery insists the 30-year-old, who is the club's top earner on £350,000 a week, is not fit enough to take part in Thursday's Europa League tie and did not travel with the team to Belarus.