Nottingham Forest have appointed former Middlesbrough boss Aitor Karanka as their new manager.

Forest stunned Arsenal during the weekend by knocking them out of the FA Cup under the guidance of caretaker manager Gary Brazil after parting ways with Mark Warburton last month.

Karanka who led Boro to the Premier League during the 2015-16 season has agreed a two-and-a-half year deal with the two-time European Champions, taking over a Forest side who are in 14th place on the Championship standings.

"We are very pleased to have reached terms with Aitor Karanka to become the manager of Nottingham Forest," said chairman Nicholas Randall of the Spaniard, who left the Riverside Stadium in March as the Teessiders' Premier League return lasted just one season.

"He is an exceptional candidate who fully subscribes to the vision of the club's owners and board for the future of the club.

"I want to thank Gary Brazil, his staff and the players for their professionalism and loyalty in the last few days. In particular, the performance against Arsenal was truly outstanding and shows the potential of this fantastic club."