Bournemouth have completed their third signing of the week after agreeing a deal with Blackburn striker Joshua King.
Chief executive Sam Rush believes changing head coach will not see Derby fall behind in the summer transfer market.
Norwich City have confirmed six players, including Javier Garrido, Carlos Cuellar and Mark Bunn, are to depart the club.
Bournemouth have signed goalkeeper Adam Federici on a free transfer after his Reading contract expired.
Graham Dorrans has signed a two-year deal with Norwich City following a successful loan spell with the club.