The Celtic man struggled with injury last term.
Do Arsenal need Julian Draxler?
Rangers duo James Tavernier and Martyn Waghorn have reportedly snubbed new deals at Ibrox.
The defender joined Newcastle United from Atletico Madrid on Friday.
Ibrox side Glasgow Rangers are set to return from their tour of America today.
Leeds United have been quite busy in the summer transfer window so far.
West Ham United have reportedly snubbed the chance to sign Robin van Persie.
The Northern Irishman is preparing for his first season in charge of the Scottish Premiership side.
The striker joined Newcastle United from Crystal Palace last week.
Leeds United have signed Kemar Roofe from Oxford United in the summer transfer window.