Ireland are back in fifth place in the IRB World Rankings, after the dramatic events in Paris on Saturday saw them edge out France 22-20 and claim the Six Nations Championship.
France drop two places to seventh with Wales grabbing sixth place after their big win over Scotland.
No ratings points were gained or lost in Rome by victors England or Italy as the rating gap between them going into the match was too great for an England win to have any effect.
Scotland remain 10th in the rankings, but are now less than one rating point ahead of Fiji in 11th.
Further down the rankings, Spain just failed to break into the top 20 despite a 28-24 away win over Portugal. Portugal drop two places to 24th, below Namibia and Korea.
Georgia (16th) and Russia (19th) gained ratings points with victories over Romania and Belgium respectively, but not enough to improve their rankings positions.
The only rankings match this week is a big one - the first leg RWC 2015 play-off between Uruguay (20th) and USA (18th) - to decide who goes into Pool B of the showpiece event in England next year.