"For weeks I have been telling anyone willing to listen about how well we have been playing but it wasn't possible to use our normal passing game in this match," he said.
"It was all about scrapping and showing determination to get a result and I felt we shaded it over the 90 minutes."
The key moment in the game came as Peterborough were pegged back straight away after opening the scoring.
"We were guilty of over-celebrating our goal," lamented home boss Darren Ferguson.
"It was as if we had won the World Cup and as a result we lost concentration and ended up with the ball in our own net less than 60 seconds later."