Mike Catt says Ireland won't allow Blair Kinghorn to play "in his dinner suit" as the hosts aim is to make the novice no 10 at Test level endure a tough day at the Aviva Stadium.
Kinghorn played his schoolboy rugby as an out-half but, at professional level, is a regular back three player.
He has been converted back to out-half this season at club level with Edinburgh, where he has played eight games in 10 games in the pivot role.
But in terms of international experience, his one start at no 10 came in the November win over Tonga, while he also briefly replaced Finn Russell off the bench against Wales and England.
Tomorrow's Aviva Stadium clash is his first Six Nations start in the playmaker role.
Ireland backs coach Catt is a fan and admits it is key for the home side to shut down the 25-year-old stand-off.
“I have watched some footage of Blair and he is a fantastic player," said Catt.
"I think he has a good running game, he is very explosive, he has a hell of a passing game and if he gets the time and the space his kicking game is exceptional too.
“We would like to think that we won’t give him the opportunity to sit back and play the game in a dinner suit, so it is crucial that we do get after him.
"But as a rugby player and what he will do for that Scotland team, it's massive so he's a big threat to us.”
Catt has been at the heart of Ireland's transformation over the past 12 months into a team that plays an effective possession and passing game and can top off this championship by claiming the Triple Crown against the Scots.
While Ireland won at Twickenham last Saturday, scoring four tries in the process, Catt will want an improvement on his players' decision-making - tries were left behind as passes were forced at the wrong time against England's 14 men.
"I think we'll take the four tries first and foremost," said Catt.
"Every team that comes out of the game thinking they should have scored an extra couple.
"It was just the manner in how we didn't score them really which is something that we've worked on.
“All in all, it goes back to staying calm and being able to see the bigger picture on the back of it so that’s very fixable.
"Everything that went a little bit awry last week is very fixable.
"That’s a sign of this team at the moment, how quickly we can learn our lessons, move on and drive the team where we want to go.
"It is the first time some of those guys have gone to Twickenham so to experience it was amazing.
"Again, there were some very very good performances and also the confidence we showed and the pride that we played with, that was huge to see."
Catt confirmed that Andy Farrell's side, which will have three changes from last week's victory, came through today's Captain's Run at Lansdowne Road unscathed and ready to go tomorrow.
"Yeah, all good," he said. "The sun is shining outside, it's St Patrick's weekend, so it's all good."
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