Aberdeen produced a stunning late turnaround to defeat Hearts 2-1 in their Scottish Premiership opener, scoring twice in the closing moments to snatch victory at a jubilant Pittodrie.
Hearts appeared on course for all three points after Oisin McEntee fired the visitors ahead in the 35th minute.
The defender calmly slotted home following a defensive lapse from Aberdeen, giving the Edinburgh side a deserved lead.
With clear-cut chances at a premium, Hearts looked comfortable for much of the contest as the hosts struggled to create meaningful opportunities.
Aberdeen did not register a shot on target until the 70th minute, when summer signing Chris Cadden forced a routine save from goalkeeper Beau Reus.
Stephen Robinson's side lacked attacking spark for long periods, but everything changed in a dramatic finale.
Lewis Mayo bundled home an equaliser in the 90th minute after Stuart Armstrong's free-kick caused chaos inside the Hearts penalty area.
Following a lengthy VAR review, the goal was awarded, setting up a thrilling finish.
Just 33 seconds later, Hearts defender Stuart Findlay brought down Toyosi Olusanya as the forward burst into the penalty area.
Findlay was shown a straight red card, and Kevin Nisbet made no mistake from the spot, blasting his penalty high into the net to complete a remarkable comeback.
The dramatic victory provided Robinson with a perfect start to his first full season in charge after taking over permanently from Peter Leven.
Although Aberdeen struggled creatively for much of the afternoon, their late pressure finally paid off as they overwhelmed Hearts in the closing stages.
For Hearts, the defeat will be a bitter disappointment after controlling large spells of the match without putting the contest beyond Aberdeen's reach.
The summer departures from Tynecastle, particularly the loss of influential striker Lawrence Shankland, were evident as the visitors failed to find the second goal that would have sealed the result.
Manager Wouter Vrancken now faces mounting pressure after his side's heavy Champions League qualifying defeat and this painful league collapse ahead of a difficult European trip to Benfica.
Hearts looked in complete control for most of the afternoon, but a chaotic finish saw all three points slip from their grasp in dramatic fashion.
Aberdeen manager Stephen Robinson tells BBC Sportsound: "If you're going to win a game, it's a good way to do it.
"I didn't think there was a lot between the two sides, which is a compliment to our boys because Hearts are a very good side.
"The final third, I thought we could've been better with our decision making and our final choices. As the game went on, I thought we improved. The subs made a real impact. I believe in what we've brought in."
Hearts head coach Wouter Vrancken tells BBC Sportsound: "Really disappointing because we give it away in five minutes.
"It was good in the defending part, until the last five minutes. We were not ruthless enough in boxes. We had to be smarter. We were going in attack with too many people there instead of keeping control and managing the counter, especially when you are 1-0 ahead.
"Second half, we did some good things and we controlled the game. It's a pity because we had to take three points here."
