After controlling the first half, Paul Pogba’s foul on Hector Bellerin led to a penalty in the 68th minute which Pierre-Emerick Aubameyang smashed into the bottom-right corner.
It meant the north London side tasted victory away to a “big six” side for the fist time since January 2015, which was a 2-0 win across town against Manchester City.
And Ozil used his Twitter channel to share a message with supporters on the victory.
Posting a poll for man of the match, the German simply said: “Crucial win, Gunners.”
Arsenal’s win pushes them up to eighth in the Premier League, four points off leaders Liverpool.
When Aubameyang’s penalty hit the back of the net, Ozil shared another post which read: “Yeeeeees!
“Finally… Well deserves - Aubaaaaaaaaaa - back on the score sheet.”
While he posted at half time with: “Good first half lads - keep pushing Gunners. Let’s get the goals in the second half.”
Ozil was also excluded from the Gunners’ Europa League squad this season, meaning the man on £350,000-a-week in unlikely to play any football this season.
It saw the Gunners boss try to defend his actions, saying he was in conversations with the midfielder.
But his agent was not impressed, saying last month: “Arsenal fans deserve an honest explanation, not [Arteta] saying 'I failed Ozil.'
“You didn't fail Ozil: you failed to be fair, honest and transparent and treat someone with respect who has a contract and was loyal all the time.
“I spoke with at least five teammates who say he is training great. They say Mesut is one of their best players, and they cannot understand why he is left out.
“So it can't be the training -- if it is not the pitch, what are the footballing reasons? If you talk, you should tell the truth that the Arsenal fans deserve otherwise don't talk at all.”
It comes as Ozil’s tweets saw him get offered a role at BT Sport for their Europa League coverage.