|Venue: Cracovia Stadium, Krakow Date: Tuesday, 27 September Kick-off: 19:45 BST|
|Coverage: Listen on BBC Radio Scotland Extra/DAB/810MW, live text commentary on the BBC Sport website & app, highlights on BBC One Scotland from 22:45|
Scotland will play Ukraine in the Nations League decider on Tuesday.
Several players have withdrawn from the squad due to illness, including Che Adams and Lyndon Dykes.
Adams said he is ready to play as the Scots try to preserve their spot at the top of Group B1 with a win or a draw.
"We've got some kind of bug in the camp."
We're not short of issues and we want to finish the job. It's a case of dealing with what's going to happen now.
Scotland has a two-point lead at the top of the group after winning at home to Ukraine and away to Ireland.
If they don't lose in Krakow, they'll gain Nations League promotion and a chance to play in Euro 2024.
The Scotland boss said they had not done anything yet. We want to finish the job. We have to play to get the result we want.
We want to keep improving. It's another step in the process of getting Group A promoted.
Ukraine knows how good we are. We are determined to play to our best.
The withdrawals of McKenna, McTominay and Tierney led to the call up of two Hearts players.
The Scots were already without their captain and defender Andy Robertson and goalkeeper Jon McLaughlin.
Greg Taylor is expected to replace Tierney at left-back with Josh Doig also available.
After the win over Ireland, Doig was called up, along with Clancy and Porteous.
The full-back came off with a knock on Saturday but was back in action on Monday.
The 23 players that Oleksandr Petrakov had for the Armenia game are still available. Heorhiy Bushchan, who missed last week's match in Glasgow, isn't included in that group.
Oleksandr Petrakov knows what he will have. Good players are present. All the experienced players are missing. We have one team, a good team, and I believe in my team.
We all want to get promoted to League A. We want to play home games again.
Che Adams said that they have had a good couple of games. It's about getting over that final line and showing how good we are.
Everyone wants to do well for the country. We want to keep up the good work at hand. The improvement has been huge since I arrived 18 months ago. We are good and smart.