Peterborough boss Darren Ferguson praised his side’s belief after goals from Hector Kyprianou, Jonson Clarke-Harris and Kwame Poku saw them come from behind to win 3-1 at Barnsley.
The home side took the lead through Barry Cotter six minutes after the break before Kyprianou equalised with 16 minutes remaining.
Clarke-Harris struck two minutes later and Poku added a third five minutes from time.
Ferguson said: “From the moment we went behind, I thought we were absolutely outstanding.
“It was a really good game and a good advert for the league. Two really good teams.
“I thought that both teams had moments in the first half. Nick (Bilokapic)’s made a couple of good saves and we’ve probably had the more clear-cut chances.
“I told the players at half-time that we had to be more ruthless.
“We lost a soft goal but the reaction to losing the goal was outstanding.
“Even if we’d lost tonight, with that performance, I wouldn’t have been disappointed.
“I wouldn’t have been as happy but I would have been delighted with the way the players responded after going behind.
“As a manager, I was delighted with the belief that they kept thinking they would get something out of the game and that’s what we did.
“We just kept going and we were relentless. The first goal was fantastic. It was really, really good play and a great finish.
“Then we just stepped on the gas a little bit and managed to win the game.
“Absolutely delighted with the performance of the players. A young team with real belief.
“If you’re going to be successful, you have to come to Barnsley on Tuesday nights and get results and we’ve managed to do that.
“I’m delighted with the amount of chances we created and overall I’m delighted. No-one’s getting carried away – it’s a good start but it’s just a start.”
Barnsley head coach Neill Collins was disappointed to see his side lose their grip on the game after going ahead.
He said: “That will take a little bit of digesting. For everything that we did well for the first 55 minutes, I thought we then proceeded to do the opposite almost.
“Up until that point, the team had been fantastic, both sides of the ball, against a very good side.
“I thought we deservedly took the lead and should probably have been ahead at half-time.
“We came out and felt confident that we could get that goal, but then I’m not quite sure why we then proceeded to lose the cohesion that we had and stopped doing the things that we’d done so well.
“I felt that we just became sporadic and more individualistic at times. Despite a couple of warning signs and the goalkeeper in particular making one fantastic save, the goals were cardinal sins in terms of ones we gave away.”