Players from Celtic and Liverpool could be long-term options for the Scotland captaincy.
West Ham United lost Jose Fonte to China earlier this month.
Glasgow Rangers received a boost this week, with James Tavernier signing a new contract at Ibrox.
Rangers have turned down three offers to lure striker Alfredo Morelos away from Ibrox.
Glasgow Rangers boss Graeme Murty has done a great job since returning to the Ibrox hot-seat.
Rangers are still without a new permanent manager following Pedro Caixinha's Ibrox exit.
Everton playmaker Ross Barkley looks set to leave the club this summer.
Rangers youngster Billy Gilmour left Ibrox for Chelsea this week.
Ibrox side Glasgow Rangers take on Celtic in the semi-final of the Scottish Cup.
Davie Provan has been discussing the impact that Brendan Rodgers has made since arriving at Celtic.