Diego Costa scored twice as Atletico Madrid ended Real Madrid's winning run in Finals with a 4-2 victory to lift the European Super Cup.
Atleti produced a display of clinical finishing to come back from 2-1 down against their capital rivals, who lost their first non-domestic Final in 18 years and conceded more than three goals for the first time since Rafa Benitez's doomed reign.
Madrid had only Luka Modric missing from Julen Lopetegui's first competitive XI against Atleti, who handed a debut to new signing Thomas Lemar.
This was the fourth all-Spanish Super Cup in five years and the first to be held in the Estonian capital of Tallinn, although Diego Simeone was forced to sit it out in the stands due to a touchline ban.
Los Colchoneros had lost just one of 12 previous Derbis against their capital rivals, and Costa needed just a minute to take down a long ball, drive into the box and blast a half-volley past Keylor Navas from a tight angle for the competition's fastest-ever goal.
However, Madrid quickly began to dominate possession and Gareth Bale showed Juanfran Torres a clean set of heels down the right, before his pinpoint cross towards the far post was headed across Jan Oblak by Benzema.
There was little action until the game’s third goal some 40 minutes later, when Juanfran Torres clumsily handballed in the box, allowing Sergio Ramos to coolly send Oblak the wrong way.
Yet with just 10 minutes remaining, substitute Angel Correa cut the ball back for Costa to tap in. It was welcome respite for the striker, who came close to blows with Ramos on several occasions.
Marcelo almost won it for Madrid, but his scissor kick with the last kick of normal time was straight at Oblak.
That signalled another 30 minutes of football in Tallinn, and out of nowhere Saul Niguez added to his ever-growing list of golazos as he smashed home a half-volley on the edge of Los Merengues’ penalty area.
It got even better for Atleti, who lost to Madrid in the 2014 and 2016 Champions League Finals, as Koke finished off another left-wing cross with aplomb.
In what was Lopetegui’s first competitive club match since January 2016, the former Spain boss guided his new team to their heaviest defeat since a 4-0 hammering by Barcelona in November 2015.
As for Atleti, they claimed their third Super Cup and first for six years.
Real Madrid 2-4 Atletico Madrid (AET)
Benzema 27, Ramos pen 63 (RM) Costa 1, 79, Saul 98, Koke 104 (AM)
Real Madrid: Keylor; Carvajal, Varane, Ramos, Marcelo; Isco (Vazquez 83), Casemiro (Ceballos 76), Kroos (Mayoral 102); Bale, Benzema, Asensio (Modric 57)
Atletico Madrid: Oblak; Juanfran, Savic, Godin, Lucas Hernandez; Saul, Koke, Rodri (Rodri 71), Lemar (Thomas 90); Costa (Gimenez 107), Griezmann (Correa 57)
Referee: Marciniak (POL)