Lennon Miller and James Wilson have earned their maiden senior call-ups for Scotland.
Miller and Wilson are both aged 18 years-old and have previously played for Scotland at youth-level but have been handed their first call-ups to the senior team, having impressed for Motherwell and Hearts across the winter.
Kieran Tierney and Lewis Ferguson have been recalled in defence and midfield respectively, whilst Kevin Nisbet is back in the forward selection after rediscovering his form at Aberdeen on loan from Millwall.
Scotland will kick off their Nations League Play-Off against Greece away in the first leg on Thursday 20 March (7:45pm GMT), followed by the return leg at home on Sunday 23 March at 5pm GMT.
Both fixtures will be broadcast live on BBC One Scotland under a new UK broadcasting contract struck with UEFA.
Goalkeeper: Craig Gordon (Hearts), Liam Kelly (Rangers), Ciaran Slicker (Ipswich Town)
Defence: Grant Hanley (Norwich City), Jack Hendry (Al-Etiffaq), Max Johnston (Sturm Graz0, Scott McKenna (Las Palmas), Ryan Porteous (Preston), Anthony Ralston (Celtic), Andrew Robertson (Liverpool), John Souttar (Rangers), Kieran Tierney (Arsenal)
Midfield: Ryan Christie (Bournemouth), Lewis Ferguson (Bologna), Billy Gilmour (Napoli), Lennon Miller (Motherwell), John McGinn (Aston Villa), Kenny McLean (Norwich City), Scott McTominay (Napoli),
Forward: Che Adams (Torino), Tommy Conway (Middlesbrough), Kevin Nisbet (Aberdeen), James Wilson (Hearts)