Shaun Wane was both 'proud' and 'gutted' after Wigan were edged out 19-18 in a thriller at Castleford.
Jamie Ellis' late drop-goal was enough for Castleford to snatch the two points from the grasp of Wigan, who had a 12-4 lead at half-time.
The result saw the Tigers leap into third, just a point behind second-placed Wigan - with St Helens leading the way six points clear.
"I'm very proud, our effort was good," said Wane. "If there was a lack of effort, I'd be annoyed, but I'm okay. I'm just gutted we didn't get anything out of it.
"We did some dumb things in the second-half which put us under pressure and it took some juice out of our attack when we got the ball back. We did some good things - but not enough.
"This could have gone either way but they did enough in the end."
The Warriors lost Dan Sarginson early in the match to a knee injury which Wane said "doesn't look good" - the centre will have the joint scanned tomorrow.
Wane praised Castleford who are "busted, down on numbers" and added: "It says a massive amount about the youth development of both clubs."
Forward Liam Farrell is set to return to the squad for their next game, at home to Leeds on Thursday, and Wane will be hoping his England players return unscathed.
Tigers coach Daryl Powell, who was missing 11 of his first-choice 17, said: "It's a significant win for us, a huge win. I couldn't be prouder because we're ravaged by injury."
He had no complaints with the late sin-binning of Matt Cook for an accidental crusher tackle. "But I don't think anyone saw it, you can't just guess," he said, complaining at the "inconsistency."