Derby County boss Gary Rowett has come under fire from supporters.
Derby County lost 2-1 at home to Middlesbrough.
Championship duo Leeds United and Derby County are keen on Birmingham City's Blackpool loanee Solomon-Otobor, as are West Ham United.
A host of clubs have been linked with Peterborough United’s Jack Marriott.
Derby County signed Tom Huddlestone and Curtis Davies from Hull City last summer and should target their Championship rivals again.
Derby County’s Jamie Hanson has signed a new contract with the club.
Derby County boss Gary Rowett has come in for criticism from a section of the supporters.
Nottingham Forest beat rivals Derby County 5-2 in 2010.
Wolverhampton Wanderers defeated Derby County 2-0 at Molineux on Wednesday.
Derby County lost 2-0 to Championship leaders Wolverhampton Wanderers.