Wenger acknowledged that empty seats were a concern.
Winter arrivals Pierre-Emerick Aubameyang and Henrikh Mkhitaryan each grabbed a goal and an assist apiece in the win over Watford, offering manager and supporters alike some assurances over the team's improvement. "But our job is to perform and stick together in important moment and get the fans back on side with our game".
Victory for sixth-placed Arsenal took them to 48 points, eight points behind defending champions Chelsea.
With Arsenal holding a 2-0 lead against AC Milan and playing the second leg of their last-16 tie at home on Thursday, Wenger took a risk by making six changes.
The Germany worldwide defender headed the home side into the lead in the eighth minute and took Arsenal into a half-time lead.
The Czech Republic international's save from Deeney was also the first penalty he has kept out in an Arsenal shirt. "Whenever I play against Arsenal, I'll go up and think 'let me whack the first one and see who wants it'".
"They all just backed off".
"Of course I am really happy [for Wenger] because I am here because of him. And yes I feel a little sad", the 28-year-old said.
"It's been a while and I have to say that it's never happened that I've had to wait 11 games for a clean sheet", Cech said after the match.
"I am really frustrated because the rules are a bit... I believe I got this far through my work ethic". We need some more games.
Aubameyang is ineligible for Thursday's Europa League second leg against former club Milan, and so can not play for Arsenal again until their Premier League clash with Stoke on April 1.
Ozil reached the milestone in 141 Premier League matches, two quicker than the previous record-holder Eric Cantona. That was, however, Cech's first penalty save since February 2011, when he was still playing for Chelsea, where he earned 162 of his now 200 clean sheets.
Sunday's goal was Aubameyang's third in five Premier League outings with Arsenal and he celebrated with his now customary somersault.
Arsenal manager Arsene Wenger, speaking to BBC Sport: "It was a hard game like you get in the Premier League". It certainly showed in his last game against Watford, where he picked up a goal and an assist, and stuck a celebratory front flip for good measure.
Shkodran Mustafi has come in for vast amounts of criticism in recent weeks but his performance at the back showcased a solid, composed defender who isn't shy of going up for set pieces. And they're [rules] a bit ....not maybe stupid but something like that.