1. Mako Vunipola, England
Cian Healy's work against France shouldn't go unnoticed, but Mako Vunipola just made those extra contributions in the loose against Italy to warrant his inclusion in this week's line-up.
In for Joe Marler at the Stadio Olimpico, Vunipola's carrying made a big difference for the visitors, and he was eventually rewarded, barrelling over for England's fifth try in Rome, as well as helping his side win all five of their scrums.
2. Rory Best, Ireland
Ireland's Mr. Consistent was unsurprisingly one of those figures that Joe Schmidt was able to lean upon for a stern performance in Paris; his 13 tackles were good enough for the third-highest tally at the Stade de France.
Ireland won 13 of their own line-outs against Philippe Saint-Andre's side, the vast majority of which Best was responsible for, and while Dylan Hartley deserves a mention for his outing against the Italians, Best's success in delivering against high-profile opposition gets the nod this week.
3. Mike Ross, Ireland
The second Irish cog in this week's front row is Mike Ross, whose scrummaging gave Thomas Domingo such a torrid time in the French capital that Saint-Andre was forced to whip his loosehead off after 40 minutes.
Ross was spotless in defence, making seven tackles and not missing any of his attempts, and while he didn't manage to get ball in hand very often, his frame at tighthead helped pave the way to Six Nations glory in a big way.
4. Paul O'Connell, Ireland
They say it's the mark of a true leader when a man is able to rise to the occasion when it matters most, and when the stakes were at their highest in Paris this weekend, Paul O'Connell certainly did just that.
Only Chris Henry managed more than the lock's 15-tackle total, showing that size isn't always a factor in getting about the pitch. O'Connell's pristine work at the line-out helped the Irish claim a crucial set-piece victory, too.
5. Alun-Wyn Jones, Wales
O'Connell's Welsh counterpart Alun-Wyn Jones had a standout display of equal impression against the 14 men of Scotland, albeit with nowhere near as much on the line.
Warren Gatland's men claimed their highest-ever points margin against Scotland with a 51-3 win at the Millennium Stadium, Jones adding 15 tackles to the mix, carrying for 22 metres and also helping his outfit rule at the line-out.