| Venue: Twickenham Stadium Date: Saturday, 26 February Kick-off: 16:45 GMT |
| Coverage: Listen to match commentary on BBC Radio 5 Live, BBC Radio Wales and BBC Radio Cymru; text commentary and highlights on BBC Sport website and app. |
Lewis Ludlam says that the similarities between his club captain and his Northampton team-mates are over.
When it comes to their leadership style, Lawes is facing a slightly more vocal Biggar, with the more laid back Lawes being described as "polar opposites" when it comes to their leadership style.
It will be the first time in the history of the fixture that both captains have come from the same club.
It is only the fourth time in the history of the Six Nations that two players from the same team have led their country.
It will be a new experience for Lawes and Biggar, who have only led their country twice before.
In terms of their leadership styles and the way they hold themselves around the club, they couldn't be more polar opposites.
Courtney is very laid back in how he does things. I think he is a bit shy which is surprising for a lot of people.
Dan is a vocal leader. He is the first person to say when something isn't right and the first person to give a man a grill to get the best out of him.
They are both very different in that regard.
Lawes, making his first Six Nations appearance, seems to agree with the assessment.
Biggar is slightly more hot-headed than him, according to the 33-year-old.
Lawes said that he was looking forward to playing him.
I am a bit calmer. Bigs is a very good speaker and he drives the team in that way, whereas I lead by example and don't say much.
Biggar was Lawes team-mate when he joined Northampton.
Biggar thinks Courts will be more relaxed than him on Saturday.
It can be white noise if you have a lot of people who speak a lot of the time. When Courts has something to say, people tend to tune in a little bit more closely, and focus in.
The way the players communicate with the referee will be intriguing.
The Six Nations title hopes of both teams could be affected by refereeing decisions.
It remains to be seen if Lawes will be taken more kindly to by Adamson or if Biggar will be taken more kindly to him.
Courtney is quiet but he doesn't shy away from the truth.
If something needs to be said, she will say it.
The way they speak to the referee is going to be a big difference between the two of them.
Dan is usually very vocal at the club. The way he thinks about how he speaks and comes across to the ref has probably changed because of that.
Lawes and Biggar have acknowledged that it will be a special day when they captain their country against one of their friends.
But one of the few things the pair have in common is their competitive nature - a fact made plain when Lawes expressed his desire to land a trademark big hit on Biggar early in the 2021 fixture.
There will be no place for niceties in a packed stadium for a crucial game.
They are both fierce competitors, according to Ludlam.
There are no friends on the rugby pitch. They want to win a lot of things.
They are not going to let friendship get in the way of it. As soon as the 80 minutes are over, they will have a beer together, but anything before then is just another game.
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