Last update on. From the section ChampionshipWayne Rooney, Derby manager, was frustrated when his team conceded two late goalsPeterborough United won the Championship with a dramatic comeback victory over Derby County thanks to stoppage-time goals by Siriki Dembele and Harrison Burrows.After 70 minutes, there was little between the teams. Posh scored in the 91st, 100th, and 101st minutes to win the game.It was Darren Ferguson's first league win after being promoted to the Championship.Wayne Rooney's Rams will rue the fact that they gave away the lead so late after Jack Stretton's strike at 77 minutes had broken the deadlock.There were few clear chances in the first half. The best was scored by Jonson Clarke Harris of Peterborough on 34 minutes. Kelle Roos, Derby goalkeeper, was unable to stop his long-range shot. The ball rolled under his feet and he picked it up with his hands.Seven minutes into the second period, Stretton, 19, was called in to replace Colin Kazim-Richards.Rooney will be further misery if the forward is seen being taken off. His options are already limited by the transfer embargo on his side.After 71 minutes Stretton had the chance to make his side ahead, but he couldn’t get to Louie Sibley’s goal-crossing pass.Six minutes later, his strike on the half-volley went in the back of net after a corner bounced around the box.Peterborough brought in their teenage replacement, Burrows (19 years old), who made a big impact. He scored Posh's first goal from Joe Ward's cross eight minutes after he arrived.The dramatic victory of Peterborough was then secured by Dembele, who took Jack Marriott's place.Darren Ferguson, Peterborough United manager:"The players deserve a lot for turning it around and getting a result. The game would be a success if the injured players were involved. It would also help the team who were struggling to keep up. We were that team and I knew something was possible as soon as we scored the equaliser."Harrison put himself in a great place to bring us up and Siriki finished it off with a composed finish at such an important moment in the game. We have a strong record of winning back games so it is important that we continue to do that at home."I felt frustrated because I thought we were lacking a little belief for most of the game. We conceded a poor goal to lose the game and were left with no other choice than to take chances and go for it."The Championship League is a constant league. I stressed to players that it was important to score points from this game. I am delighted with the way we did it."Wayne Rooney, Derby County manager:"It was a lapse in concentration. It's an individual mistake that has cost us. They were able to get back into the game, and then another individual mistake gave them the second goal."It's frustrating for a coach to concede so many goals, but overall I felt we were the stronger team and deserved the win. This is football. If you lose your concentration for more than 90 minutes, you can be punished.