Autumn internationals - Wales v Argentina Venue: Millennium Stadium Date: Saturday, 21 November Kick-off: 1430 GMT Coverage: Exclusively live on BBC ONE Wales and online, full commentary on BBC Radio Wales, Radio Cymru and online, live text commentary online and score updates on BBC Radio 5 Live
Lobbe backs 'world's best' front row
As Wales prepare to take on Argentina on Saturday, the strength of both scrums is under scrutiny after Wales coach Warren Gatland stoked the fires.
Wales have struggled in the scrum but claim they will attack the Pumas there.
Asked for his thoughts on Argentina's status as arguably the world's greatest scrummagers, Gatland said: "I disagree... they are not the greatest."
But Argentina hooker Mario Ledesma said: "I'm happy... if he thinks that - we just have to prove him wrong."
The scrum is the emblematic element of the Pumas' red-blooded style of play, while Wales have struggled up front this November in tight-head Adam Jones' injury absence.
Gatland's comments at the Wales team announcement
Ospreys loose-head prop Paul James has been moved across the scrum to start at tight-head against New Zealand and Samoa.
He held up reasonably well against the All Blacks, whose scrum was given a grilling by Italy in Milan last Saturday.
But James creaked against Samoa - who are not renowned for their set piece - and his replacement, Craig Mitchell, struggled badly in the closing minutes.
Rookie Mitchell is the only dedicated tight-head in the Wales squad, although first-choice loose-head Gethin Jenkins can also play there.
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