The big three, Australia, New Zealand and South Africa, are currently boasting a 100 per cent record after two weekends of action.
The Wallabies' 28-14 victory over England at Twickenham Stadium followed on from their 30-20 triumph in Italy the previous weekend, while the All Blacks are now two from two in their quest for another Grand Slam tour.
Their 22-3 victory over the Irish in Dublin extended their unbeaten run to 103 years against Ireland and they will be hoping to make it 20 victories in row over Wales next weekend at the Millennium Stadium.
The world champion Springboks, meanwhile, dug deep to reverse a 10-0 interval deficit in Edinburgh to finally overcome gallant Scotland 14-10. Coming on top of their 20-15 victory over Wales the previous weekend it puts them on course for a clean sweep when they travel to face England at Twickenham on Saturday.
And if you add the Argentinean's 22-14 win in Italy, the only northern hemisphere win to date this month has been France's 12-6 victory over the Pumas. It means he score moving into the third weekend currently stands at Southern Hemisphere 7, Northern Hemisphere 1.