The twinkle-toed wing, who scored the try which helped beat England 11-9 in the RBS 6 Nations opener, is determined Wales make it two wins out of two.

And Wales have never achieved victories in the opening two matches of the championship since it went from the five nations to six in 2000.

But despite the delight in the Wales camp following the win over the old enemy, Williams insisted it has been business as usual this week.

''We came down to earth pretty quickly after the England game. Underlying the ecstasy of that win and the celebrations we knew this is a long campaign,'' said the Ospreys wing.

''Everyone is experienced enough and professional enough to know that Six Nations Championships are not won in the first week.

''Yes, we have beaten England and we have started well but at the end of the day we have got four more games to go.

''We would be bitterly disappointed to beat England but lose all the rest of the games, and we are desperate to go out and prove that England just was not a one-off and we are good enough to do well.

''But Italy will be tough out there. They proved against Ireland that they are no walk-overs and that they are improving week in, week out.

Two years ago Wales lost in Rome, a match Williams watched in his front room because he was out of favour with the then coach Steve Hansen.

''It was a dire time for me to be honest,'' he recalled.

''I never gave up hope that I would get back in the Wales team. I was certainly confident in myself.

''It was a difficult time to be watching Wales because I felt I should have a chance in that tournament, and it was double disappointment because of the performance in Rome that day.

''It was a case of helpless frustration from my point of view.

''I am sure a lot of the boys who were involved in that game will be looking to put things right at the weekend.''