David Luiz responded to criticism following Arsenal's defensive display in their north London derby draw with Tottenham at the Emirates.
The Brazil international said the Gunners need to 'take responsibility' and improve their defensive performance to avoid making the kind of mistakes that cost them during their 2-2 draw against Mauricio Pochettino's Spurs on Sunday.
Defensive errors cost the Gunners two first-half goals from Christian Eriksen and Harry Kane before Alexandre Lacazette and Pierre Emerick-Aubameyang equalised for the homeside.
"I think [the criticism] is normal, in my all my career it has been like that, especially when you are a defender," he told Sky Sports News.
"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.
"I'm going to try to do my best always. My game until the penalty at Liverpool was very good, especially for our first big game.
"Today, even with pain I played the whole game and tried to show spirit until the very end.
"I am trying to improve with the team every single day. You have to be mature to understand this kind of moment."