Wenger insisted Fabianski - who will play against Champions League opponents Bayern Munich for the suspended Wojciech Szczesny - will continue to play in the FA Cup for the semi final.
Wenger added: “Lukasz will take heart from the fact we qualified. For him it is another opportunity to play, and I am not worried for him.
“He will play in the semi-final, yes. I make decisions when they are needed so let’s not make them too quickly. At the moment of course he deserves a chance in the semi.”
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