France are rolling towards a possible Grand Slam as they arrive in Cardiff for game four in their Six Nations mission, but Fabien Galthie's team must not switch off now.

The championship may yet see a France versus England title decider at the Stade de France next weekend, but whether 'Le Crunch' proves crucial will hinge on results this time around.

A mighty Welsh effort in Cardiff could knock the French juggernaut off course, while Ireland will believe they can achieve a result at Twickenham.

Scotland and Italy, meanwhile, tussle in Rome. That was once typically a Wooden Spoon decider; this time, the Scots are heavy favourites.

Ahead of the fourth round of fixtures, Stats Perform previews each match with help from Opta.

WALES V FRANCE

FORM

Wales have lost each of their last two meetings with France in the Six Nations, after winning seven of their previous eight clashes in the championship. France's 27-23 win at the Principality Stadium two years ago was their first success in Cardiff in the competition since 2010, and France have not won back-to-back away games against Wales since reeling off four in a row from 2000 to 2006.

Wayne Pivac's Wales won at home against Scotland last month but have lost on the road to Ireland and England. The Welsh have pulled off 10 wins from their last 11 matches in Cardiff in the Six Nations, with France the only side to beat them during that sequence.

This France team are living up to their billing as pre-tournament favourites and have won their last six Test matches, their best run since also winning six on the bounce in 2006. They have not won more consecutive internationals since a run of eight in 2004, which included a victory in Cardiff.

ONES TO WATCH

Among players to hit 20 or more attacking rucks in this season's Six Nations, Wales' Ross Moriarty has the best ruck effectiveness rate, cleaning out the opposition or securing possession at 96 per cent of the attacking rucks he has hit (27 of 28). Moriarty is not a starter this week, as Pivac rings the changes, but will surely have a role to play off the bench.

France's Damian Penaud would have been a strong contender here, having beaten 10 defenders in this year's Six Nations, the joint most of any player alongside Scotland's Darcy Graham, with Penaud also achieving a championship-best tackle evasion rate of 77 per cent. Penaud is ruled out by a COVID-19 positive test, so can his fellow wings Yoram Moefana and Gabin Villiere prove as elusive?

ITALY V SCOTLAND

FORM

There was a time when Scotland dreaded facing Italy, but those days appear long gone. The Scots have won their last six matches against the Azzurri in the Six Nations, last losing at Murrayfield in 2015. Prior to this dominant era, Scotland had won nine and Italy had won seven of their first 16 clashes in the championship. The Scots have won their last four away games against Italy.

Italy's losing run in the competition has now reached a dismal 35 games, and that Murrayfield victory seven years ago was their last success. Kieran Crowley's team have failed to score a try in their last two Six Nations games, the first time this has happened for Italy since they went on a run of three games without a try in the 2009 championship.

Ali Price is set to win his 50th cap for Scotland. The Glasgow Warriors scrum-half has scored just one try in his seven appearances against Italy, although he has four try assists across his last two Tests against the Azzurri.

ONES TO WATCH

Michele Lamaro has made 59 tackles in this year's Six Nations, at least 13 more than any other player. That is the upside. The downside is that he has also missed the most tackles of any player (13); however, only one of those missed tackles led to a break, with the other 12 seeing the opposition player tackled by a team-mate.

By contrast, Scotland's Hamish Watson has made 31 tackles without missing one so far in this year's competition. Only Ireland's Caelan Doris has made more without missing (36/36). Watson has now made 180 tackles in the championship since his last miss, which came back in 2019 against England.

ENGLAND V IRELAND

FORM

England have tended to like this fixture of late, having won four of their last five home games against Ireland in the Six Nations. A 24-15 defeat in 2018 was the exception in this run which started in 2012. England have also won 22 of their last 25 home matches – taking all opponents into account – in the Six Nations (D1, L2).

Yet Ireland are the only side that England have a losing record against in the Six Nations era, winning just 45 per cent of their meetings in the championship (W10, L12).

Whoever leads at half-time seems nailed on for the win. None of the previous 22 Six Nations matches between England and Ireland have seen an interval deficit overturned to bring about a victory for the trailing team.

ONES TO WATCH

England's Marcus Smith is the leading points scorer so far in this year's championship. He has 48 points, meaning Smith is two shy of becoming the fifth different England player to notch up 50 points in an edition of the Six Nations (Jonny Wilkinson 7 times, Toby Flood once, Owen Farrell 6 times, George Ford once).

Ireland's Doris has been a 'nuisance' (slowing the opposition ball) at more rucks (7) than any other player in this year's tournament, Opta data shows.