"I was very pleased with the win over Watford, though I still think we showed a better performance when we were at Stoke - who have had back to back wins since we beat them.
"You are always looking for perfection and although we were delighted with the result I think the players are still capable of a lot more with the squad we have.
"Perhaps I am being greedy, though, because 4-0 was a good score, and we always say if we keep clean sheets at the back we are always capable of scoring; that is how it has proven in the last couple of weeks.
"We have put pressure on the back four by not taking as many chances as we should have, but on Saturday there was a bit of breathing space."
As for the trip to Wigan, he adds:
"We are going to go there with a single-minded approach, because those last two games don't make a season.
"It is at the stage now where the wins are vital coming towards the final straight - if we win our own game we don't need to worry about anything else.
"There is still a lot of improvement to be done but hopefully by Sunday evening we will be sitting in the playoffs."
Peter insists that the talent is there and adds:
"I have never questioned the players' ability since we got here but we have questioned a million other things.
"We have got to get away from being a Jekyll and Hyde side - the supporters, as well as ourselves, turn up and don't know what we are going to get.
"In the last two weeks we have shown a consistency in performance and if you can add the work ethic to the talent you have a chance.
"But they have got to perform well all the time, not just in every four or five games, which was happening, unfortunately.
"There are still a lot of questions to be asked; we have had big games before where we haven't produced.
"But we have a little confidence - though there is still a lot of work to do before this season is over, that's for sure."
Meanwhile, Mark Noble once again skippered England as they reached the last four of the UEFA U17 Championship following a 3-1 win over holders Portugal in Tours.
As in the win over Ukraine earlier in the week, Kyle Reid also started.