After leaving Arsenal to agree a two-year deal with the Black Cats on Wednesday, the Italian is impressed by the facilities and infrastructure on show at the Stadium of Light
The Italian moved to the Stadium of Light form Arsenal on Wednesday after spending seven years with the London club, and he is impressed by the infrastucture at Sunderland.
"The potential [of the club] is incredible. I have come from a big club but to be honest I don’t see any difference in the facilities," the 25-year-old told Sunderland's official website.
"From what I can see on my first day they are brilliant.
"To have good facilities where you can work and improve is something every club wants to achieve. The base is there and I am really happy to be here.
"I waited a long time for an opportunity like Sunderland, and for me it is a great one. I’m very excited. I am here to work hard and to show what I can do."
Mannone is likely to act as a replacement for Simon Mignolet, with the Belgian moving to Liverpool last month.
However, he will need to battle it out with Kieren Westwood for the role of first-choice goalkeeper, something that Mannone is well aware of.
"Of course, every player knows they have competition," he continued.
"We live in a world of competition. I will work and do my best to be in the first eleven, and then the manager will decide.
"All I can do is try to show what I am capable of."