Manchester City cruised past rivals Manchester United in the first leg of their Carabao Cup semi-final.
The Red Devils welcomed their noisy neighbours to Old Trafford but were embarrassed on what was nothing short of a terrible night.
Bernardo Silva, Riyad Mahrez and an own goal from Andreas Pereira gave Pep Guardiola's a 3-1 win, with Marcus Rashford scoring a consolation.
There is a second leg at the Eithad of course, but by all accounts, the tie is pretty much over.
So, how long did it take for Guardiola to plan City's Old Trafford masterclass? Well, according to Kevin De Bruyne, not very long at all.
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"We did 15 minutes [of tactical drills] this morning. That’s about it," the Belgian said post-match, per The Guardian.
"But it’s not like we've never played that way before. We already did against teams who prefer to play man against man - Cardiff, United I think.
"[We played that way against] Barcelona the first year. So we’ve done it a couple of times."
Still, the fact that City were familiar with their tactics probably won't make United fans feel any better.
Ole Gunnar Solskjaer's gameplan was absolutely ripped apart by Guardiola's rampant visitors.
The fact he only spent 15 minutes of the training session working on his tactics just rubs salt into the wounds.
In fact, it's very worrying for Man United fans.
Will Solskjaer ever be capable of going toe-to-toe with a manager like Guardiola? In reality, probably not.
Yes, United pulled off a shock 2-1 win at the Etihad in December, but that was arguably down to Man City failing to turn up.
When both teams are firing there's only going to be one winner - and we saw that on Tuesday night.News Now - Sport News