Celtic star ruled out of international duty as one of two call-offs

Celtic defender Colby Donovan has been ruled out of international duty after withdrawing from the Scotland Under-21 squad. Tony Docherty's side is set to play friendly matches against Ukraine and the USA in Pinatar, Spain. Calum Adamson, currently on loan at Raith Rovers from Rangers, also pulled out of the squad, prompting call-ups for Sam Chambers and Sebastian Lochhead.

Donovan played 90 minutes in Celtic's 1-0 win over Kilmarnock on Sunday and has made 21 appearances across all competitions this season. Meanwhile, Switzerland captain Granit Xhaka has withdrawn from his national squad ahead of their Nations League match against Scotland after suffering a calf injury playing for Sunderland against Chelsea.