The Gunners got revenge over the Hornets who put them out of the FA Cup last month.
The 27-year-old star played the full 90 minutes but was unable to add to his impressive assist record.
Following the game we took to social media to see how Mesut Ozil performance went down with Arsenal fans. Its safe to say the World Cup winner received positive reception for his role in his sides win.
Ozil received a rating of 7.39 for his performance today by WhoScored. The Germany international maintained a passing accuracy of 92% and took 126 touches on the ball.
Arsenal were a goal ahead after just four minutes when Alexis Sanchez found the back of the net. The young star Iwobi doubled the home sides lead seven minutes before half time.
Hector Bellerin put Arsenal 3-0 ahead in the 48th minute while Theo Walcott scored his sides forth in injury time.