A mouthwatering round three of the Six Nations could be pivotal in a battle for the title that appears to be wide open. Family loyalty will go out of the window on Sunday when England and Ireland do battle.
Ireland beat defending champions Wales 24-14 in Dublin last time out, while France also made it two wins out of two with a 35-22 triumph over Italy. The joint-leaders will not have home comforts for the first time in the tournament with Ireland taking on England at Twickenham on Sunday.
England captain Owen Farrell could inflict a first defeat on his father, Andy, since he became Ireland head coach. With that in mind, we take a look at how Andy Farrell has tweaked Ireland's structures and how Eddie Jones' charges can counter Farrell's tactics.
Watch Omar Mouneimne's full analysis of the two side's below:
What's interesting about Ireland under Farrell is that they're willing to have a go form just about anywhere.
They're willing to have a go from a kick receipt and from a counter-attack where it might not be on straight away, but they're willing to keep the ball and work the space.
So what's important, if you have a look at this clip, they run this kick-off from Scotland.
Scotland have got three back waiting for Ireland to kick it back at them, as they would normally do under Joe Schmidt. However, Ireland keep the ball and get to the 40-meter line because it's based on their age and they have a full go.
I'd recommend England use a similar tactic that they used against Scotland.
They managed to kick off deep with a massive race chase.
Scotland feel the pressure of the chase and have no choice but to kick or get caught ball and all and end up getting charged down.
So there would have to look at a tactic like that with a high and heavy line from kickoffs. Don't give Ireland the chance to play and force them to kick.
In the next clip Ireland counter-attack and despite going backwards for multiple phases before Lamour gets his line break.
England are excellent exponents of the box kick box but if they are to kick to them, they're going to have a very heavy and very high concentrated line and force Ireland into two errors and not allow these line breaks.
A typical tactic of England is an up and under with a race chase and a massive line pressure. if Ireland dropped the ball in their half, well, then England, have got a big scrum and could convert that into pressure and points.
I think this chip over the top from the scrum is a good tactic for England because of Ireland's massive defence and great choke tackling and you see England, obviously, with Hogg's error scoring the try from the resulting scrum.
And also the one last factor is England have the highest territory stats in the tournament and if they play neat football, they could coerce Ireland into a high error rate in the half.