Wigan assistant boss John Kear said he "sensed" all week that his team would upset favourites St Helens and win the Kellogg's Nutri-Grain Challenge Cup.
The Warriors got their hands on the trophy for the first time since 1995 thanks to a stunning 21-12 success over the Cup holders at Murrayfield.
The win also eased the pressure on Wigan coach Stuart Raper, who had come under fire following a disappointing start to the Super League season.
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After the first try, which was an exceptional try, we just felt it was our day
"
Wigan's John Kear
"We just felt we were going to come away with the spoils. Weżve sensed it all week," said Kear, who also led Sheffield Eagles to a shock victory over Wigan in 1998.
"Preparation was very good and it was a very good camp.
"After the first try, which was an exceptional try, we just felt it was our day."
The former England coach said Wigan's defensive effort was a big factor in the win and singled out Lance Todd Trophy winner Kris Radlinski for special praise.
"We had an awful start when Julian [O'Neill] dropped the ball, but defensively we fronted up to them and forced them into errors," said Kear.
"Defensively we looked very, very comfortable."
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From sick bed to Lance Todd Trophy is a great, great story and Kris thoroughly deserves it
"
Kear on Radlinski
Radlinski had been a major doubt for the final after being hospitalised with a blood infection in his right foot.
He was only confirmed as a definite starter 90 minutes before kick-off but came up with another magnificent display to earn the man-of-the-match award.
"Kris Radlinski is a very special player," said Kear.
"He made two or three try-saving tackles and put boot to ball, which must have hurt him. His carrying of the football was outstanding as well."
Kear added: "It's such a great story, isn't it? Every year the Cup final throws one up.
"From sick bed to Lance Todd Trophy is a great, great story and Kris thoroughly deserves it."