Leigh Griffiths and Kieran Tierney are among four players to miss Scotland's opening 2018 World Cup qualifier against Malta.

The Celtic duo have pulled out of the squad along with Crystal Palace midfielder James McArthur and Fulham's Kevin McDonald.

On-loan Hearts forward Tony Watt and Rangers captain Lee Wallace have been called up as replacements for Sunday's game at the Ta'Qali Stadium.

Griffiths has scored seven goals in nine appearances this season but has been substituted in the last two matches due to a hamstring injury.