That is because both squads of players deemed their performances disappointing despite the commanding scorelines.
In fact the American youngster can draw a number of comparisons between the North London outfit and his current club – not least the standards they set.
The 18-year-old said: “You don’t see a team being disappointed after a win at professional level very often.
“I remember playing against Galatasaray in the Champions League last year when I came on in the second-half and they had played really well in the first half.
“But Lukas Podolski scored the fourth goal and he was telling us “This is awful” while we were celebrating, so the standards here are similar to Arsenal.
“We are happy we got the win but we all know that the standards we have set ourselves have got to be better than that.
“I thought we were sloppy at times on the ball but we got the three points at the end of it all.
“The standards had dropped and we all knew that right after the game and we exchanged some words in the dressing room but it was all good things and it definitely won’t happen again.
“We had a good training session today, we were sharper, the intensity was very high and I think we are over Saturday now and we will just concentrate on Dumbarton.
“We said after the game that it has to be better and that the fans expect more and we expect more from ourselves.
“We said that we can’t stay complacent because if we do then one team will have their best day and we will have our worst.”
Saturday’s game was Zelalem’s fourth in a blue jersey and he noticed a definite change in attitude within the squad leading up to the match.
It is not one he or his teammates were pleased with and they have vowed to make amends before their Championship clash with Dumbarton.
He is also looking to grab his first goal for the club and add himself to the list of 11 players who have already netted one of Gers 32 goals this term.
He explained: “The training standard had dropped a little bit in the last week and that was probably part of it because you have to train the way that you play.
“Most of us would admit we had dropped our standard in training and you could see that on Saturday but today training has been really good and our standards are up high again.
“I think maybe we had become a bit complacent, we had just won 5-0 against Raith and I had just come back from the international break but that won’t happen again and we are focussed.
“You see the best teams in the world, the likes of Barcelona and Bayern Munich and they are at it every day in training and every game.
“I definitely didn’t play as well as I had against Raith Rovers and I’m disappointed not to have scored yet but that will come.
“I need to add goals to my game, a lot of people have said that but my first thought it always to look for the next player and to get to that next level I think I have to have goals.
“We do a lot of finishing here which is very good for me and my development and we practice free-kicks but Tav is taking all of those right now!”