Robbie Henshaw believes Ireland 's fledgling centre partnership faces its toughest RBS Six Nations test yet in Wales on Saturday against Jamie Roberts and Jonathan Davies . Connacht battering ram Henshaw has rubbished the suggestions that Warren Gatland 's Wales are past their peak that surfaced after the 21-16 home defeat to England . Ireland 's 21-year-old midfield sensation will pair up with Jared Payne in the centres for just the fifth time in Test action at the Millennium Stadium . Ireland 's newest sensation Robbie Henshaw ( left ) believes Wales will give him the toughest test of his career . Roberts and Davies will combine from the start for the 38th time on Saturday , at the heart of an unchanged line-up following victory over France in Paris . ' I think it could definitely be the toughest test for me and Jared , ' said Henshaw of the challenge against Roberts and Davies . 'Wales are very direct but also they run decoy lines with Roberts coming up , only to throw it out the back and go wide . The centre scored a crucial try during their victory of Six Nations rivals England at the Aviva Stadium . 'It 's going to test us big-time , so we 've got to be prepared and stay connected in defence , and just keep our communication up all day . ' Racing Metro centre Roberts will win his 68th Test cap for Wales this weekend while Clermont 's Davies will make it 47 in Cardiff 's pivotal Six Nations clash . Ireland can remain on course for a second Grand Slam in seven years with victory on Saturday , with a trip to Scotland still ahead . Jared Payne ( left ) celebrates with the scorer as Ireland look in pole position to win the Six Nations . Ruthless boss Joe Schmidt this week omitted veteran centre Gordon D'Arcy from his 36-man training squad for the remaining two Six Nations contests . D'Arcy and Brian O'Driscoll set a world record 55-Test centre partnership in their wide-ranging careers . Henshaw has long been touted as the now-retired O'Driscoll 's natural successor at outside centre , but has instead found himself replacing D'Arcy at 12 . The Athlone native is gearing up for just his ninth cap in Cardiff , with New Zealand-born Payne in line for his fifth Test bow . The new Irish sensation is being touted as the player to replace legend Brian O'Driscoll ( centre ) So from boasting the world 's most experienced centre pairing en route to last year 's Six Nations title , Ireland will concede 101 caps to their midfield rivals against Wales this weekend . Henshaw has vowed he and Payne 'wo n't hold back ' however , buoyed by his first Test try that clinched Ireland 's 19-9 victory over England on March 1 . 'This Wales team is absolutely not past its peak , ' said Henshaw . 'The fact that they are at home and that they play their best rugby at the Millennium , they 're going to cause a massive threat for us . 'So we 're going to have to be squeaky clean on the day in terms of our discipline and we 're going to have to take all the chances we get . Henshaw knows he 's in for a tough afternoon when he comes up against the experienced Jamie Roberts . Wales centre Jonathan Davies ( centre ) has formed an impressive partnership with Roberts over the years . 'It might be more open than the England game , but we want to stick to our game plan and follow through on what the coaches want from us . 'It 's not going to be more than a two-score game though . 'They are not predictable either : they have a lot of different options available to them with Dan Biggar at 10 . 'He gives them a good attacking threat and good aerial skills in the team . 'We 're just going to have to be prepared for anything . ' I think the Welsh centre partnership is up there with one of the best in the world . Jonny Sexton ( left ) is Ireland 's danger man with some labeling him as the best fly half in the world . 'They have a really physical threat and massive size in that 10 , 12 channel from Jamie Roberts , and then a very good ball player and direct runner in Jonathan Davies . 'They are going to test us big-time this week but we are fully prepared for what they are going to throw at us . 'We 'll have to get off the line quickly in defence and shut down their space and options as early as we can . 'We 'll look to get into them early , and we wo n't hold back . Head coach Joe Schmidt ( centre ) is closing in on winning the Grand Slam with Ireland once again . ' I 'm constantly learning , growing into it more and more , getting a bit more confident with every game , especially with Jared outside and Johnny ( Sexton ) inside . 'We 're building a good relationship there , so at the moment we 're just looking to build on recent performances . 'We 're feeding off each other at the moment , learning little bits all the time , and growing too . '
Robbie Henshaw denies Wales duo Jamie Roberts and Jonathan Davies 'are past it ' and reckons he 'll have his toughest test yet on Saturday . The centre has been in impressive form during Grand Slam . Henshaw scored a crucial try against England in their last match . Click here for all the latest Six Nations news .