Northampton Saints skipper Dylan Hartley said his side were able to notch one of the biggest revenge missions in the history of the Heineken Cup only after they had taken a long, hard look at themselves in the mirror after their six try beating by Leinster at Franklin's Gardens.
A week later they turned a 40-7 home hammering into a magnificent 18-9 triumph in the Aviva Stadium to throw qualification in Pool 1 wide open once again.
"It was unbelievable. We are a proud bunch and last week's performance was way off what we are about. A week is long time when you have been hammered by 40 points," said Hartley.
"We had a good look in the mirror and revisted a lot of fundamentals and I'd like to think we restored a little bit of faith in the shirt. Last week we focussed on the result too much.
"The pressure was off us today and we came here and simply focussed on the performance. We backed that up with our physicality and 80 minutes of intensity and it paid off.
"It was a hell of a win and a hell of a challenge. We got bullied on our own pitch last week so we came here with a big focus on the tackle area and it paid off.
"The result wasn't the most important thing for us it was the performance and so we kept on trying to play."
Four-time champions Leinster still lead Pool 1, but only by four points from Saints. They still have to travel to face French champions Castres Olympique and have to receive PRO12 bogey side Ospreys in Dublin.
The atmospheric Stade Vélodome in Marseille looks set for a 40,000 plus attendance for the Heineken Cup semi-final clash on Sunday, 27 April between reigning champions, Toulon - gunning for a fourth European final in five years - and Munster Rugby, who have reached a record 11th tournament semi-final.