Porto stunned Juventus by punishing a huge error to score after 63 seconds of Wednesday’s Champions League tie.
The Serie A giants had never conceded a goal on their previous visits to Estadio Dragao but fell apart in the 2-1 first leg defeat.
In the first minute, Rodrigo Bentancur received the ball from Wojciech Szczesny in his own 18-yard box and attempted a no-look pass back to the goalkeeper.
But the Juventus midfielder was far too casual and Szczesny had to dive in to compete for the ball with Porto’s Mehdi Taremi.
Taremi won the 50/50 and stabbed his effort home to secure an amazing early lead.
It was the fastest goal scored in a Champions League knockout game since David Alaba struck 24 seconds into Bayern Munich’s 2013 quarter-final tie… against Juventus.
Giorgio Chiellini was replaced by Mehdi Derimal after the half-hour mark with the substitute chosen over Leonardo Bonucci, who was named on the bench despite struggling with a muscle injury.
The Old Lady were out of sorts throughout the first period but would have hoped for a reaction after the break.
Alas, Porto struck again – this time within 19 seconds of the whistle – to go 2-0 up.
Wilson Manafa’s surge run down the right ended with a smart cutback to Moussa Marega.
The Mali forward controlled the ball and drilled past Szczesny to put the Portuguese side firmly on top in the tie.
Andrea Pirlo threw on Alvaro Morata and Aaron Ramsey but Porto were able to surpass nine hours of Champions League football without conceding a goal.
The hosts came close to the third goal of the night when Liverpool loanee Marko Grujic headed wide after meeting a fine corner.
Yet Federico Chiesa put Juve on the board with a potentially huge away goal on 82 minutes.
The winger’s accurate finish from Adrien Rabiot’s cross could spark the Italians, denied a penalty after Ronaldo hit the deck in the last minute, into action in next month’s Turin return leg.