Arsenal made a number of signings in the summer as they plot a way back into the Premier League top four.
The Gunners broke their record signing when they splashed £72m out on Nicolas Pepe, and he was joined by the likes of Dani Ceballos, Kieran Tierney and David Luiz.
The latter shocked the footballing world after signing from Chelsea in a £8m move.
However, Unai Emery was largely praised for replacing Laurent Koscielny with another centre-back as experienced and also with a glistening trophy cabinet.
But it has hardly been the most impressive of starts for the Brazil international – who has already made an array of errors.
Against Liverpool, Luiz was at fault after being bamboozled by Mohamed Salah throughout – conceding a penalty against the Egyptian before letting him through on goal for a second in a 3-1 defeat.
And the 32-year-old did not cover himself in glory against Tottenham on Sunday after being partly at fault for the opener.
With Luiz just needing to hold his line, the veteran star made the bizarre decision to lunge in – allowing Erik Lamela space in behind to race through on goal.
His effort was saved, poorly by Bernd Leno, with Christian Eriksen stealing in the score in a 2-2 draw at the Emirates.
After the match, Luiz insisted that Arsenal’s defence must be ready to take criticism this season.
Speaking to Sky Sports, he said: “I think [the criticism] is normal, in my all my career it has been like that, especially when you are a defender
“Strikers never lose games unless if they miss a penalty in the last minute, this is football.
“The defenders have to take responsibility and take [criticism] in a good way, in a humble way.
“We need to understand when we make a mistake and say that.”
Arsenal are now out of action due to the international break but face Watford upon the Premier League’s return in two weeks time.