The Everton defender is in the England squad for Euro 2016.
Leeds United are said to be discussing the manager's position with the former Swansea City boss.
Nigel Pearson became Derby County's new manager earlier this week.
Aston Villa are set to announce Roberto Di Matteo as their next manager in the near future.
The former Derby County captain worked under the club's new manager at Leicester City before their return to the Premier League.
Barcelona have been linked with the Argentine international.
Michael Duffy wants his future to be at Celtic, but admits another loan is possible.
Leeds have parted company with manager Steve Evans.
The Tottenham Hotspur youngster has made headlines for good and bad reasons this past season.
The winger was sensational for the Championship side before his injury.