Swansea City thrashed bitter rivals Cardiff City 4-0 on Saturday to seal a league double for the first time ever in the fixture's long history.
In the 110-year history of the South Wales derby no side had ever managed to string home and away wins together - until today. The Swans were clearly the better side as they followed up a 3-0 win at home earlier in the campaign with an even more emphatic Championship victory.
Michael Obafemi opened and finished the scoring at the Cardiff City Stadium, with goals at either end of the contest. Inbetween, Ben Cabango fired home from a corner and Hannes Wolf headed in his first-ever Swansea goal.
Swansea boss Russell Martin saluted his side afterwards, saying: "I have not felt as emotional as this after a game, I am incredibly proud of the players and what they have done.
"It was a big build-up to the game, we were written off by a lot of people and to do that and show that courage is fantastic. They took the atmosphere out of the game with the way they controlled the game in that first 15 minutes, and everything we had worked on over the last two weeks was put into practice.
"They showed everything they can be, we had young men out there who showed they can grow in a tough situation.
"Cardiff had been in really good form under Steve (Morison) and we have come here and limited them and were a real threat.
"We were clinical, that is something we have not always been this season, but we really were here. We showed the team we can be and I hope it is a small reward to the supporters for the patience they have shown us.
"I'm so pleased for all of those people that are involved behind the scenes. To watch the backroom staff and the players enjoy that with the supporters was the best moment I've had as a manager I'd say."
The result puts the Swans five points clear of their bitter rivals with a game in hand to boot. Cardiff boss Morison had no excuses for his side's capitulation.
He said: "It's the losing that hurts.
"I would say it's a tough one to take but it's not because they were better than us all over the football pitch. We have let ourselves down. We can't dwell on it. Hopefully we don't dwell on it too long, because the remit when I took the job was to keep this club in the Championship next year - not to win certain games.
"Obviously, we all want to win this game for the magnitude of it and how big it was. And I'm in charge when we've had the first double done against us. It's a worse defeat than we had earlier in the season, but the goal was to stay in the Championship so that's what I'm going to focus on."