The north London side are still challenging in both the Premier League - they lie three points adrift of current leaders Chelsea - and Champions League, where they must overcome a 2-1 first-leg deficit to Porto to secure a place in the quarter-finals.
"We have grown up and are wiser than last year and two years ago," Sagna told Arsenal.com. "We have learned a lot and now I think we can deal with the pressure.
"Having experienced players like Sol Campbell and William Gallas is massive because they know what it means and they know how they felt at the moment when they won.
"They can help us to imagine what we can do and what we can achieve all together. It is very important for them to talk a lot to the team and make us calm."