Sam Warburton has said that Wales can improve, despite their Six Nations win over England on Saturday.
A late try from Scott Williams fired Wales to a 19-12 victory and their first ever Triple Crown on English soil.
"I know it sounds a bit daft, but I was a little bit disappointed at the final whistle," the Welsh skipper said. "You've got give us some credit for winning but I knew we hadn't actually played as well as in the first two games.
"To win the Triple Crown is absolutely brilliant, a fantastic achievement, but we still know there is more there.
"There are a few things we can sharpen up on."
Wales next face Italy at the Millennium Stadium on Saturday, March 10.
