The Gunners have only signed two players, Petr Cech and Mohamed Elneny, this season.
The Gunners were heavily criticised during the summer transfer window, as they were the only side in Europe’s top five leagues not to sign an outfield player, with Petr Cech their only incoming player.
They were equally quiet in the January transfer window, with them only bringing in midfielder Mohamed Elneny from Basel.
While some perceive that as a mistake from Arsene Wenger, Monreal insists their lack of activity has been vital to the success they’ve enjoyed this season.
“I can see now there is only one group,” he told arsenal.com.
We are together and in every moment the atmosphere is amazing - this is very important to get trophies. If you want to win something it is necessary to have a good group.”
"In the last few years we have played with the same players. Every summer, we have signed one, two or a maximum of three players. The team is practically the same group so that is very important.”
As there are not several new faces for the Gunners to use, they will be keen to see their returning stars have an impact in the last 12 games of the campaign.
Danny Welbeck has already proved a hit with his winning goal against Leicester City on Sunday, while Francis Coquelin’s return was also a successful one in the heart of the midfield.
With the likes of Jack Wilshere and Santi Cazorla also due to return, they will be hoping all can be like new players for them as they eye the title this season.