It's hard to think that the Arsenal side that slumped to a 2-0 defeat at Stamford Bridge was predominantly the same group that hammered Galatasaray so emphatically in the midweek Champions League fixtures.
Even though Arsenal spent the remaining half an hour with ten men, they still registered six shots on target. Last weekend, at home to Tottenham they also had six efforts on target, though they only managed to scored from one.
But away to Chelsea, the scene of their emphatic 6-0 hammering last season, Arsenal failed to have a shot on target from their ten attempts on goal, the first time since 2003 they have recorded such a disappointing statistic.
It didn't matter that they tried for goal double the amount of times Chelsea did, the more telling statistic, though not as much as the final score of course, was that Chelsea managed to put three of their attempts on target and Arsenal had none.
On Sunday, Wenger tinkered with the attacking formation that worked so well on Wednesday, benching Alex Oxlade-Chamberlain in order to bring Jack Wilshere into the midfield. But it also meant shoving Mesut Ozil out wide where he once more failed to influence the game, poor Welbeck was never going to find the same kind of freedom he had at the Emirates against Galatasaray, but he had very little attacking support, and now Wenger will be hoping his fragile confidence, only recently built up, won't have taken a beating from this Chelsea loss.
Welbeck could yet become a very good Premier League striker, though to hope he can become the new Herny is exactly that, hopeful at best. He is a work in progress, and absolutely a valid one that will impress against 60% of the teams in the division.
But the truth of Arsenal's strikers are, none of them are world beaters, none of them can affect a game of this magnitude in the manner Luis Suarez or Diego Costa or Sergio Aguero can.
And until they bring in someone that has that fear factor, that can do something few other footballers can, Arsenal may continue to struggle in the crunch games against their fellow top four regulars.