The 25-year-old finished as the Hoops' top goalscorer in the Scottish Premiership last season.
The midfielder featured in the pre-season friendly win over Gak 1902 on Saturday.
Rangers’ Martyn Waghorn finished as the club’s top scorer last term.
Tottenham continue to be heavily linked with a move for Mario Gotze.
Waghorn finished his season at Ibrox as the top goalscorer in Mark Warburton's Glasgow Rangers squad.
Sunderland are yet to make a new signing this summer.
Everton are reportedly making a move for Napoli ace Kalidou Koulibaly.
Aston Villa defender Joe Bennett scored in the Midlands side's first friendly of the season.
Tottenham Hotspur’s Hugo Lloris and West Ham United’s Dimitri Payet have impressed David Moyes with their performances for France.
The Everton defender has been heavily linked with a move to Manchester City this summer.
The Turkish forward has had an instant impact in Brazil.
Theresa May has launched her bid for the Conservative leadership , promising that the UK will leave the EU and saying the country needs a prime minister who can unite the country.
Happy Birthday will presumably be being played on repeat in Apple Music’s offices today. It’s one year after Apple’s music-streaming service launched and it has 15 million subscribers.