Oxford United boss Matt Bloomfield spoke to BBC Radio Oxford following Saturday's defeat at Derby County.
"Arguably, we had the three best chances of the game – two breakaways and a great chance right at the end," he said.
"I was really disappointed with how we played in the first half and it was nowhere near good enough.
"By the end of the game, with our intensity, the way we played and the chances we created, it was very frustrating because it is a clear illustration that that if you take your chances you get the points.
"We haven't got the time to rest on it [the loss], it's done now and we have to move on very quickly to Tuesday evening and make sure that the intensity and the energy we had in the second half is there from the first whistle."
