Derby County lost Gary Rowett to Championship newcomers Stoke City but Pride Park chairman Mel Morris is already putting plans in place.
Former Sheffield Wednesday manager Carlos Carvalhal and Swansea City have parted company.
The Sheffield United manager could get another one over the former Sheffield Wednesday boss.
The former Sheffield Wednesday midfielder was already familiar with Carvalhal.
Carvalhal only arrived at Swansea City in late December, just days after he left Sheffield Wednesday by mutual consent.
A recent report suggested that Leeds United had already opened talks about a summer deal for Kyle Bartley.
Portuguese youngster Renato Sanches has returned to help Swansea City in their remaining five games of the Premier League season.
As Rafael Benitez is talked up as a contender to replace Arsene Wenger at Arsenal, who could Newcastle United turn to if he left?
Mawson has played a key role in Swansea's revival under Carlos Carvalhal - who is a friend of Manchester United manager Jose Mourinho.
Swansea City drew 1-1 with West Bromwich Albion on Saturday.