Ikechi Anya is out of Scotland's crunch European Championship qualifier against Poland at Hampden Park on Thursday night, manager Gordon Strachan has confirmed.
Scotland are facing several permutations which could leave them in a playoff spot for next year's finals in France but defeat against the Poles would end their hopes before the Group D finale against Gibraltar in Faro on Sunday.
However, Watford winger Anya will be unavailable to help the Scottish cause.
Strachan, speaking at the national stadium, said: "Ikechi is not going to make it, he has a tight calf so he has gone back to get treatment at Watford.
NEWS | Gordon has confirmed today that @IkechiAnya and @charlie_mulgrew will not feature in #SCOPOL through injury. pic.twitter.com/2THeHBPOXZ
- Scottish FA (@ScottishFA) October 7, 2015
"James Morrison (suspended for Poland game) is going to struggle. He got an injury at the end of the game against Crystal Palace the other day.
"Charlie Mulgrew (thigh) was never going to be fit. Charlie is only here because he wanted to be here and add to the squad and what we do behind the scenes and he has certainly done that."
Scotland are currently fourth in Group D on 11 points, behind Republic of Ireland (15 points), Poland (17) and leaders Germany (19).