Craig Levein has urged his Scotland players to use a sense of injustice following their 2-1 World Cup qualifying Group A defeat to Wales to drive them on to victory in Belgium.
A first-half opener from James Morrison was undone by a late double from Gareth Bale as the home side fought back to claim a dramatic first victory of the Chris Coleman era. However, the outcome could have been very different had a Steven Fletcher goal - when the visitors were still leading with 15 minutes to go - been allowed to stand.
The assistant referee ruled that Charlie Adam's cross had swung out of play, despite television footage suggesting otherwise. Levein said: "It is a disappointment. We have all been in football long enough to understand that things don't always go your way. We have had some hammer blows and this is the latest one."
He added: "We have got an honest, hard-working group of boys who feel a bit aggrieved about what happened and we will try to use that for Tuesday. The only we thing we can do is go to Belgium and try to win the game.
"I feel an injustice but the important thing is that we react in the right manner. We have got Belgium and it makes it more difficult because we need to win in Belgium now."
There was also debate afterwards about the penalty that sparked the Welsh comeback, which was won and converted by Bale after going down in the box under pressure from Shaun Maloney.
Levein said: "I've no complaints. I couldn't see it completely myself but certainly our players didn't make an awful lot of noise about it and it very well could have been a penalty.
"The players were very quiet as you can imagine, there wasn't much said at all. I'll have a chance to have a look at it but we all know the game is finished now and whether the officials have made one, two or three mistakes, it is not going to help us now."
Fletcher was back in the Scotland side, ending his international exile, having recently resolved a long-running dispute with Levein stretching back to February 2011. The manager was pleased with the contribution of the Sunderland striker, albeit he believes the positives on the night were tempered by the result.
Levein said: "He set up James Morrison's goal and another good chance in the first half. Then, if the goal stands, he gets a goal here. So I was really pleased with his performance. We had some really good performances but the fact that we didn't get a victory takes the gloss off everything."