Scotland boss Steve Clarke has named his latest squad for the upcoming World Cup play-off and Nations League fixtures.
The Dark Blues face Ukraine on June 1 at Hampden and victory would set up a clash with Wales in Cardiff on June 5 with a place at Qatar 2022 up for grabs.
Billy Gilmour and Nathan Patterson have handed the national team major boosts by been named in the 28-man squad but Kieran Tierney misses out through injury in a huge blow.
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Celtic defender Anthony Ralston is included in Clarke's pool as is new Hibs goalie David Marshall.
Ross Stewart also lands a call-up after his stunning goal scoring season with Sunderland - including a goal at Wembley to send the Black Cats up to the English Championship.
Scotland squad in full: Zander Clark, Craig Gordon, David Marshall, Liam Cooper, Grant Hanley, Jack Hendry, Aaron Hickey, Scott McKenna, Stephen O'Donnell, Nathan Patterson, Anthony Ralston, Andy Robertson, John Souttar, Greg Taylor, Stuart Armstrong, Lewis Ferguson, Billy Gilmour, Ryan Jack, John McGinn, Callum McGregor, Scott McTominay, David Turnbull, Che Adams, Jacob Brown, Ryan Christie, Lyndon Dykes, Ross Stewart.
