“Newcastle is a massive football club”
After completing his deal, Hayden said: “Newcastle is a massive football club and to be given the opportunity to come here and progress my career is fantastic.
“Being at Arsenal was a great experience, I learnt a lot there and have a lot to thank them for, but I needed to move on and so when Newcastle came in for me I jumped at the chance.
“I am still young but I want to get as many games under my belt as I can and help the team bounce back to the Premier League.”
Benitez added: “We continue with our plan to bring in players who are hungry to succeed and prove themselves, which Isaac really is.