Steve Clarke said Scotland showed how good a team they are despite a late defeat in Spain, while John McGinn fumed at Scott McTominay's disallowed 'opener'.
Clarke saw his side's perfect run of five straight wins ended by late heartbreak in Seville, with Alvaro Morata and Oihan Sancet giving the hosts a 2-0 victory after McTominay's free-kick had been ruled out by VAR.
A draw would have been enough for the Tartan Army to secure their qualification for next year's European Championships, but they can still reach the finals should Spain pick up at least a point in their next qualifying game, away to third-placed Norway in Oslo on Sunday.
"We came here to show that we were a good team and I think tonight we showed that," Clarke said.
"Tonight was the first chance to qualify, maybe the result on Sunday night goes in our favour and we can qualify from that. But we don't qualify because of that result, we qualify because of the work we've done to have 15 points from six games.
"That's why we will qualify if a result goes our way over the weekend. If it doesn't go our way and Norway win, then we have a very realistic chance for the two games in November to win this section and that's what we'll focus on.
"We can be pleased with how we performed but the lads are really disappointed that we've lost the game because we didn't come here to lose.
"It's a VAR decision that goes against you, you just have to move on. At that stage in the game we were we're fine. The second goal puts a little bit of gloss on it for Spain, I'm not sure they deserved it as we have some good chances."
During the match, Clarke had urged his players to remain calm amid the controversy of McTominay's disallowed goal, which was overturned following a lengthy VAR
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