Arsenal boss Arsene Wenger says adding Petr Cech to his squad was not an easy decision because the Gunners already have two very good goalkeepers in the squad.
The Frenchman insists that David Ospina and Wojciech Szczesny are both "great goalkeepers" who will learn a lot from the 33-year-old.
The Czech international left Chelsea after 11 years at the club and will wear the number 33 shirt at Arsenal.
"It was a very, very tough decision [to buy Cech] because I have two great goalkeepers," Wenger told Arsenal's official website.
"I think Cech can make them [our goalkeepers] better as well.
"He has huge experience and the fact that he has won more big trophies can strengthen the belief of the team. That can help them to develop and that's what I expect from him.
"You always want to improve the experience level of your squad and I thought he could help us gain something on that front.
"I still think he has a huge hunger.
"When I saw him with Chelsea last year he was always convincing and I'm happy that we could do it. His kind of knowledge and experience can help us."
