England has had a Six Nations campaign so far, with one win and one loss, while Ireland is still unbeaten at this stage.
Jonny May and Maro Itoje are the striking artists of England so far, while Josh van der Flier and Jordan Larmour from Ireland show the way.
Here, SportsmailNik Simon takes you through both Ireland and England while we enter the important game on Saturday.
England will face a tough test against Ireland if they want to improve their Six Nations campaign
Ireland has been unbeaten so far, with some of their players delivering outstanding performance
ELLIOT DALY – 6
Age: 27 Caps: 41 A tough day to be thrown back into the high-ball shooting line with Irishmen preparing an air raid.
JONNY MAY – 8
Age: 29 Caps: 54 First on the team magazine thanks to attacking threat and the ability to find holes with his pace.
MANU TUILAGI – 7
Age: 28 Caps: 41 Go-to-ball carrier in the absence of the Vunipolas but playing time shortly after injury.
England Manu Tuilagi will be the go-to-ball carrier in the absence of Billy and Mako Vunipola
OWEN FARRELL – 6
Age: 28 Caps: 81 Missing form with unusual errors. Will hope to impress his father’s team.
JONATHAN JOSEPH – 6
Age: 28 Caps: 49 First test starts on the wing but is supported by Jones to handle any hanging high balls on his 50th cap.
GEORGE FORD – 7
Age: 26 Caps: 67 Calm voice in the ranks of England that has kicked more meters than anyone else – just shy of 1,000.
BEN YOUNGS – 6.5
Age: 30 Caps: 97 He comes closer to his 100th cap but does not show the groundbreaking ability of the world’s leading No. 9s.
Ben Youngs is approaching his 100th cap, but has not achieved the best performance
JOE MARLER – 7.5
Age: 29 Caps: 69 Widely regarded as the strongest scrummager in England, it lacks the ball skills of Mako Vunipola.
JAMIE GEORGE – 7
Age: 29 Caps: 47 Under pressure from Luke Cowan-Dickie but impressed by line-out throws in windy Scotland.
KYLE SINCKLER – 7
Age: 26 Caps: 33 “Mr Gain Line” has to run faster on the ball to prevent a repeat of his flat display in Paris.
MARO ITOJE – 8
Age: 25 Caps: 36 Has made more destructive tackles than anyone else in Six Nations and will focus on Sexton.
Maro Itoje has been the striking tackler of the Six Nations and will focus on Johnny Sexton
GEORGE CROSS – 7
Age: 30 Caps: 43 Doubts remain about the future of his Saracens, but he is still the man who lets the line-out tick.
COURT FEES – 7
Age: 31 Caps: 83 One of the five locks in the 23 where Launchbury and Ewels add weight from the couch.
TOM CURRY – 7.5
Age: 21 Caps: 21 Lack of experience at No. 8 can be exposed by an opponent in the form of his life.
SAM LOCATION – 7
Age: 23 Caps: 17 Man of match against Scotland and a key component in the mission to reduce the influence of Sexton.
JORDAN LARMOR – 8
Age: 22 Caps: 23 More meters made than anyone in the Six Nations thanks to Stuart Hogg-like footwork.
The Jordan Larmour of Ireland has made more meters so far than anyone in the Six Nations
ANDREW CONWAY – 7.5
Age: 28 Caps: 20 Striking man in victory over Wales thanks to ruthless kick-chase game.
ROBBIE HENSHAW – 7
Age: 26 Caps: 42 Offers a more imminent threat in midfield with sterman Garry Ringrose injured.
BUNDEE AKI – 7
Age: 29 Caps: 25 Played against Tuilagi as a schoolboy in Cornwall and brings similar Polynesian power.
JACOB STOCKDALE – 6
Age: 23 Caps: 27 The Six Nations of Broke Will Greenwood tried a record in 2017 but did not score in his last six games.
JOHNNY SEXTON – 7
Age: 34 Caps: 90 Even more influential as captain and England will do their best to choke the playmaker.
Captain Johnny Sexton is very influential for Ireland and is still a fantastic playmaker
CONOR MURRAY – 6.5
Age: 30 Caps: 80 Under pressure from John Cooney. Accurate boxing spades can uncover cracks in England’s back three.
CIAN HEALY – 7
Age: 32 Caps: 97 Ireland’s most experienced player keeps challengers at bay with scrum and ruck work.
ROB HERRING – 6
Age: 29 Caps: 10 The whore born in South Africa finally gets a chance after an internship under Rory Best.
TADHG FURLONG – 8
Age: 27 Caps: 43 Considered the best crook in the world, but has been accused of cheating at the scrum.
Tadhg Furlong is considered the best tighthead in the world and has had a good tournament
DEVIN TONER – 6
Age: 33 Caps: 69 The 6ft 10in giant was drafted for Iain Henderson after a bank role in opening rounds.
JAMES RYAN – 7.5
Age: 23 Caps: 25 Tipped as the successor to Paul O’Connell and received training tips from him this week.
PETER O’MAHONY – 7
Age: 30 Caps: 66 Dropped for Andy Farrell’s first game. Known for disturbing England on the line-out.
CJ STANDER – 7
Age: 29 Caps: 40 Leading the tournament charts and was man or match in the first two rounds.
JOSH VAN DER FLIER – 8.5
Age: 26 Caps: 25 Played against English clubs in Champions Cup with its typical No 7 breakdown capability.