And the Frenchman believes the Polish stopper, who he signed in May 2007 from Legia Warsaw, can go on to become one of the world’s best goalkeepers.
The 24-year-old was at fault for Didier Drogba's winner at Wembley at the weekend, needlessly rushing out of his penalty-area, after being beaten at his near-post for Florent Malouda's equalising goal.
“I would not like to put too much responsibility for this defeat on Fabianski. It would be unfair," he said.
“Let’s see him recover and not speak too much about what he has done. I believe he will be one of the best goalkeepers in the world.
“He has the talent, he is brave, he is intelligent. Technically he is very good. He was not at his best against Chelsea, but we have to accept that. It can happen to anyone. It happened to Cech on Tuesday [against Liverpool].”
Arsenal now head to Anfield on Tuesday night aiming to maintain their impressive league form and stunt Liverpool's title aspirations in the process.
And Wenger expects his team to recover from the disappointment of bowing out of the FA Cup.
“We have shown we are mentally strong in adversity this season, and now again we have another good opportunity to show it," he said.
“We want to finish strongly in the Premier League and also qualify for the Champions League final. We are in the last four in Europe, we have just played in the semi-final of the FA Cup, where Chelsea’s average age was 29. Ours is 21 or 22.
“I believe we are maturing well. These guys are winners. Now we need a good performance on Tuesday.”
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