Wenger is in no doubt his young Arsenal side are showing the heart of champions after coming from behind to beat Everton at the Emirates Stadium.
Louis Saha had put the visitors ahead after 24 minutes when he slotted home, despite being offside.
However, the Gunners - still five points behind Barclays Premier League leaders Manchester United - turned the game around through substitute Andrey Arshavin and Laurent Koscielny's header.
Everton boss David Moyes, though, was left less than impressed by the Arsenal skipper, whom he claimed should have been sent off for alleged abuse at the officials when the teams went off down the tunnel at half-time.
Wenger, however, rejected those claims and believes Arsenal have again displayed the courage needed to last the distance this season.
"It was more a victory of a team with fantastic spirit and a never-say-die attitude than our usual game, but that of course is needed in the championship," he said.
"This is maybe the aspect of the team which has been questioned the most, and recently that's where we have been the most convincing.
"Every time we have shown, even when football-wise our level dropped a little bit, we have always shown fantastic attitude."
Fabregas is no stranger to controversy, having been accused of spitting at Hull assistant Brian Horton at the end of their stormy FA Cup quarter-final in March 2009 - of which he was cleared by the Football Association - and last night had used his programme notes to clear up a Twitter row with Huddersfield's Anthony Pilkington over the swapping of shirts after their FA Cup fourth-round win on Sunday.
However, on the latest accusations from Moyes, Arsenal maintain Fabregas has no case to answer.
"I was next to Fabregas at half-time and I can't see why David Moyes is furious with him," Wenger said.
"Fabregas didn't speak to the referee at half-time, I did."
Saha was offside when Seamus Coleman chipped the ball through, but it spun off Koscielny's boot as he attempted to clear, falling to the Frenchman who slotted a low effort past Wojciech Szczesny.
Despite the protests of the Arsenal players, and consultation with his assistant Stephen Child on the far side, referee Lee Mason allowed the goal to stand.
Moyes said: "I think it was offside, but it was not Everton who made the decision.
"If the linesman does not give offside, we have to take the chance.
"Fabregas' comments to the officials when he was coming down the tunnel warranted a sending off.
"I am not going to repeat what they were.
"They were disappointing comments from someone who is such a talented footballer."
Moyes continued: "If you had said it on the pitch, you should have been off like that, so what is the difference when you are coming down the tunnel?
"We heard it, but that should not be the talking point."