Ange Postecoglou - and many in Australia - have just had heart palpitations as Spurs survive an almighty scare.
Tottenham defender Micky van de Ven was forced to produce an epic goal line clearance to deny Rasmus Hojlund after keeper Guglielmo Vicario made a complete hash of things.
It remains 1-0 Spurs after 71 minutes.
Tottenham was leading Manchester United 1-0 at halftime of the all-English final in the Europa League.
Brennan Johnson squeezed in a goal at the end of the first half to put Spurs on track to salvage a dismal season in which it will finish near the bottom of the Premier League standings.
It was an even match from the start, with neither team creating many significant scoring opportunities.
Tottenham got on the board in the 42nd minute after a cross by Pape Sarr into the area.
The ball ricocheted off United defender Luke Shaw and fell in front of Johnson, who seemed to get just enough of it to poke it across the goal line.
Tottenham is trying to lift its first European trophy in more than four decades, since it won its second UEFA Cup - the equivalent of the Europa League now - in 1984.
It would be Spurs' first title since it won the English League Cup in 2008.
It's 1-0 Spurs at halftime as Craig Foster wills old sparring partner Ange Postecoglou on.
Beautiful football has gone out the window.
"This is just about getting to the line now," Foster says on Stan Sport.
"They have not won a trophy for 17 years. We're nervous for him."
Spurs haven't won a European title since 1984.
Their last silverware was the Carling Cup (now known as the EFL Cup) in 2008 when they defeated Chelsea 2-1 in extra time.
Brennan Johnson has opened the scoring for Spurs!
It's 1-0 after 41 minutes.
It's not a classic goal as United defender Luke Shaw gets himself in a tangle trying to deal with Pape Matar Sarr's excellent cross but who cares?
There's pandemonium in Bilbao as Ange Postecoglou celebrates with his support staff.
"It wasn't pretty but it could be utterly glorious at the end of 90 minutes for Spurs," David Prutton says on Stan Sport's coverage.
"He's (Johnson) so quick across the turf and he catches Luke Shaw by surprise."