Scotland's Charlie Adam says Wales showdown is a must win

The Scots are bottom of Group A with two points from four games. They lie a point behind Chris Coleman’s men, who won 2-1 when the sides met at Cardiff back in October.

Adam believes Gordon Strachan’s first competitive game in charge will see a team desperate to improve their slight chances of making it to the finals in Brazil next year.

“We have to go for it, we are not in a good position and if we want to do something then we better start on Friday night,” the Stoke midfielder said.

“We will need to attack and we will do. Everyone in Scotland thinks we can win, the players think we can win, but it is going to be a tough match.”

Much of the build-up has centred on Gareth Bale, who scored both goals for Wales in the win over the Scots last year and 11 times in his last 11 games for club and country.

Doubts over Bale’s fitness have subsided and he is sure to start in Glasgow. However Wales will be without David Vaughan, though the Sunderland midfielder is expected to rejoin the squad before next week’s encounter with Croatia.

Joe Allen and Steve Morison are also missing, but Jonathan Williams is likely to make his international debut.

Gordon Strachan is without West Brom’s James Morrison, who has a hamstring problem. Ross McCormack, James Forrest and Danny Fox are also out.