Mathieu Flamini says Arsenal now have the physical quality in their game to be champions.
Flamini's return from AC Milan has transformed Arsenal's powder-puff midfield.
"What you need in any Arsenal side is the fighting spirit and you can see we now have that," said Flamini.
"Perhaps the physicality has been missing a bit in the past few years.
"But if you want to win leagues and cups, sometimes you have to fight for it, especially when you are playing in the hardest league in the world.
"We have a very good offensive team but it is so important to be strong defensively as that could make the difference at the end of the season.
"You have to go to places like Newcastle and be prepared to fight before playing your football. Only by doing that can you win."
