Fullback Gael Clichy believes Arsenal are learning to cope mentally with teams looking to out-muscle Arsene Wenger's young side.
He added: "Maybe the last couple of years, it was the other way, perhaps we were giving up a bit too quick, or were not focused until the end.
"This year, we are a different team with a different spirit."
Spain midfielder Cesc Fabregas agreed, adding: "Sometimes when you cannot play because they are going in very strong, you have to go for a physical game as well."