Boss pleased with team's strength.
Joe Dunne paid homage to his team's new mental toughness following the U's 1-1 draw at Sheffield United on Saturday.
"I expected them to come out second half the way they did. But it was a good challenge for us not to collapse and we didn't do that.
"We dug in deep and showed resilience with our back four and goalkeeper. Overall, it was a good days work for us."
Dunne also heaped praise to on-loan goalkeeper Sam Walker.
The Chelsea loanee had earlier allowed Harry Maguire's shot to slip through for an equaliser but Dunne believed Walker's second half performance showed the player's character.
"The goal was unfortunate for us. Sam is a wonderful player and he is one of the reasons we stayed up in the league.
"But it didn't stop him he came out second half and saved another two and he is a top player for us."
The U's boss also dedicated the result to the 240 fans who made the trip up to Yorkshire, where Sheffield hasn't been a happy hunting ground for the U's in recent times.
He said: "The travelling fans were excellent. I'm pleased after the last three years we've come here that we've had a performance and got a result for them.