St Johnstone manager Callum Davidson hailed his side for coping with the pressure after Callum Hendry earned them a crucial 1-0 win over Aberdeen to seal a play-off tie against either Arbroath or Inverness.
Hendry latched on to Glenn Middleton's cutback to settle the contest and, in turn, relegate Dundee, who had been given renewed hope following Tuesday night's 3-1 win over Hibernian.
Davidson was full of praise for the way his players dealt with any added nerves following that result, and said: "I think last night's result put a lot of pressure on us.
"Some people were saying we were definitely in the play-off, but with Dundee winning by a couple of goals, this was a game where we had to perform under pressure.
"I was really disappointed in losing to St Mirren (at the end of April) that under pressure we couldn't do it, but we did it tonight and took a big step forward going into the play-off games, having that belief in each other that we can perform when we need to.
"We've got a few knocks and niggles and a few boys are near suspension as well, so we'll need to assess the squad on Friday and take it from there, but the main focus is we've got 180 minutes of enormous football ahead of us.
"We want to stay in the league, we're desperate to stay in the league and I think you saw that tonight."
Aberdeen boss Jim Goodwin could not hide his frustration after the match, with the Dons having now won only two of the 11 matches since he took charge in February to remain 10th.
He said: "I'm extremely disappointed with the end result and the overall performance. I think the game as a whole just about sums up how the season has been really.
"We've had plenty of possession again tonight but just weren't able to do enough at the
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