Captain Chris Robshaw admits that England were unimpressive during their 18-11 victory over Italy at Twickenham.
But the back row man pointed out that, with a first Grand Slam since 2003 still very much a possibility, getting the victory against a valiant Italian side was the top priority.
Asked if it was disappointing not to have won by a more comfortable margin, Robshaw said: "Of course it was, but it was important to get a win.
"We were under no illusion about how hard it would be, especially after how hard it was in Rome last year (a 19-15 for England).
"We weren't great today but it's a win at the end of the day. There were moments when we played very well and the attack was flowing but the final bit of execution let us down.
"There's a lot of work to do going into Wales next week."
England will clinch the Grand Slam if they can triumph in Cardiff next Saturday and Italy full-back Andrea Masi, who was named man of the match after a fine display at Twickenham, thinks Robshaw's men will pull it off.
"It's going to be a tough game but I think England are a bit more dangerous than Wales," he said.
"We were quite happy to compete against England and this was a very good performance by Italy. We came from two poor games and today we played better rugby, more aggressive and much more physical."
Will England win the Grand Slam in Cardiff?