Scotland will welcome Qatar to easter Road on 5 June for a friendly international to keep progress going. Here is the squad announced for the game.
Goalkeepers
Scott Bain (Dundee)
Craig Gordon (Celtic)
David Marshall (Cardiff City)
Defenders
Christophe Berra (Ipswich Town)
Craig Forsyth (Derby County)
Gordon Greer (Brighton and Hove Albion)
Alan Hutton (Aston Villa)
Russell Martin (Norwich City)
Charlie Mulgrew (Celtic)
Mark Reynolds (Aberdeen)
Andrew Robertson (Hull City)
Steven Whittaker (Norwich City)
Midfielders
Charlie Adam (Stoke City)
Ikechi Anya (Watford)
Barry Bannan (Crystal Palace)
Scott Brown (Celtic)
Darren Fletcher (West Bromwich Albion)
James Forrest (Celtic)
Shaun Maloney (Chicago Fire)
James Morrison (West Bromwich Albion)
James McArthur (Crystal Palace)
Matt Ritchie (Bournemouth)
Forwards
Steven Fletcher (Sunderland)
Leigh Griffiths (Celtic)
Steven Naismith (Everton)
Johnny Russell (Derby County)