The Polish stopper has come in for some stinging criticism this year following a series of high-profile errors, including picking up a back pass, bundling a cross into his own net, dropping a corner onto Titus Bramble's head and allowing Robbie Keane's tame shot through his grasp only last week.
But the faith of his manager has been unwaivering and in Arsenal's 3-1 win over Partizan Belgrade on Tuesday Fabianski went some way to repaying it.
Safe hands: Lukasz Fabianski showed signs the bad days might be behind him during Arsenal's win in Belgrade
The 25-year-old produced a stunning penalty save as Arsenal wobbled at 3-1 and then flew high to his left to claw a goal-bound effort around the post.
After the spot-kick stop Fabianski let out a roar which told it's own story.
'Yes, I was happy [with the penalty save],' Fabianski said after the match. 'Who knows what might have happened had Partizan got back to 3-2. They could have thrown all their players up.
'But luckily I saved the penalty and the game was easy to finish.
'Overall I'm pleased with my performance. Not just some of the saves I made but my reading of the game, coming for the crosses and the way I played with my feet. Every aspect is important to me and in general I am pleased.'
Arsenal's current No 1 Manuel Almunia has also come in for criticism following three errors against West Brom on Saturday.
Gaff: The Arsenal goalkeeper hit rock-bottom with his performance against Porto last year
The Spaniard was ruled out of Tuesday's win and is a major doubt for Sunday's trip to Chelsea. And Fabianski insists if he is needed again, he will be ready for the challenge.
Fabianski said: 'I am ready. I was always ready.
'I was never bothered by all the things that happened. I always tried to focus on my work, on my job.
'We are all looking forward to the Chelsea match. Hopefully it will be exciting game.'
On Fabianski, Wenger added: 'Fabianski had a good game. We have seen the player [against Partizan] who we see in training. He had a faultless game.
Ready for anything: Fabianski is likely to step in for the injured Manuel Almunia against Chelsea
'I know it is in him. He got it out in the game and hopefully that will give him the needed belief and confidence. I am confident he will come out as a great keeper, I have always said that.
'We have to keep confidence in him and he needs to gain experience from games like this. At the moment Almunia is injured, we will have to see how his injury goes but at the moment it is too early to say.'
Arsenal were thoroughly outclassed by Cheslea last season, losing home and away without scoring.
Like Gunners, Carlo Ancelotti got over last weekend's domestic defeat with a routine win in Europe on Tuesday, but Ebou is confident it will be his side that translate that recovery back to the Premier League.
'We started very well in the league, but last Saturday's defeat was a big blow,' Eboue said. 'But our spirit is strong, we came away from home in Europe and won 3-1.
'Our winning mentality is back, and we really need that to meet Chelsea on Sunday.
'They are a big and powerful team and are in good form, despite losing last weekend. If you are not strong and ready against them, they will overpower and destroy you. So we will be ready against them, we are very confident about that.'
Malouda warns Chelsea that Arsenal are a much tougher beast this yearChelsea skipper John Terry admits Blues had one eye on Arsenal clash after Champions League win over MarseilleHe's a great keeper! Wenger heaps praise on stand-in FabianskiCHELSEA FC