ENGLAND'S victory over Italy means a win against Wales in Cardiff next Saturday would seal a first Grand Slam in a decade.
However, Wales have everything to play for because a victory for them could be enough to retain the Six Nations title and leave England empty-handed.
England are currently two points ahead of Wales in the table and with a points difference advantage of 14.
Under tournament rules, if the points and points difference end level then the championship would be decided on tries scored. Wales hold the advantage 7-5 going into the final round. If tries scored is also level, the title is shared.
Here are the permutations:
ENGLAND WIN GRAND SLAM
An England victory by any margin would secure a first Grand Slam triumph in a decade.
ENGLAND WIN TITLE
An England defeat by six points or fewer would still be enough to seal the title. If England lose by seven points but outscore Wales by three tries or more then Stuart Lancaster's men would win the title.
WALES WIN TITLE
A Wales victory by seven points, providing they stay ahead of England on tournament tries, would see Rob Howley's men retain the title.
If Wales win by seven points but England score two more tries then the title would be shared.
Six Nations table
P W D L F A PD Pts
England 4 4 0 0 91 48 43 8
Wales 4 3 0 1 92 63 29 6
Scotland 4 2 0 2 82 84 -2 4
Ireland 4 1 1 2 57 59 -2 3
Italy 4 1 0 3 53 96 -43 2
France 4 0 1 3 50 75 -25 1