England coach Eddie Jones admitted his side let themselves down in certain areas while his Welsh counterpart Warren Gatland spoke of his pride following Wales's stunning win over the Six Nations favourites in the Principality Stadium.
The visitors led 10-3 at half-time with Tom Curry's try just before the half-hour mark the only seven-pointer of the half. The Welsh worked hard to repel another English assault on their 22 in the dying seconds of the half and this proved critical as the hosts began to get a grip of the contest in the third quarter.
Gareth Anscombe chipped away at the deficit with penalties but the introduction of Dan Biggar was pivotal in helping Wales unlock the England defence and tries from Cory Hill and Josh Adams gave them a 21-13 win and sent the Principality Stadium into raptures.
Jones felt his players paid the price for under-performing in some parts of the game.
"It was one of those nip-and-tuck games and it's a game of small margins," Jones told BBC One.
"We let ourselves down in a couple of areas, they beat us in the air and the penalty count was strongly against us. It ended up 9-3.
"That gave them the chance to build field position and score points, and that's what happened.
"I don't know whether we lost our heads but they put us under a lot of pressure. You're always going to get some tough calls in these games when you're away from home and that happened tonight.
"A few of our players were a bit off and that happens sometimes. Full credit to Wales, they played very well and deserved the victory."
"Everything is about ebb and flow. We had a fair bit of flow. It's come back a bit today but we'll pick it up for the Italian game."
Wales head coach Gatland felt his side were worthy winners in keeping their Grand Slam hopes alive.
"I'm very proud," he told BBC One.
"We created a lot of problems for ourselves in the first half with our turnovers and I didn't think England created anything.
"The only pressure on us was what we put on ourselves. We were much better in the second half and we got stronger as the game went on.
"It was a great second half from us, tactically we were really good."