In the form of James McFadden, Gary Mackay-Steven, Ryan Gauld and Iain Vigurs, the match will feature four of the finer lefties the Scottish game has produced in the last 10 or more years and whichever executes their repertoire with the most precision on the day is likely to have a fair old say on the outcome.
If Vigurs has the lowest profile of the four, perhaps it is only because so much of his apprenticeship has been served away from the glare of the national media. At the age of 25, the native of Stonehaven is plying his trade in the central belt for the first concerted period in his career since his summer move from Ross County, but by his mid-teens his prodigious talent had already seen him spend time in the youth programmes at both Aberdeen and Celtic.
"When I left Celtic at the age of 14 I felt like I had failed a little bit," said Vigurs. "Simon Ferry, Paul Caddis and Mark Millar were in my team when I was there. But you start from the bottom and work your way up."
He may have been let go from Barrowfield, but former Aberdeen and Rangers full-back David Robertson wasn't quite so reticent, including him in the Elgin City first team at the age of 15. "It was all 'touch, tackle', that's what I remember most!" he said. "Just 6ft 5in boys bearing down on you. I played at left-back and I had no pace. The players weren't the most gifted players in the world, but it was a great experience to play against men when I was just 15. It was sink or swim."
From there, three years in Inverness and four years at Ross County have seen him gradually drift back into the national consciousness. There was a trial at Leeds United under Kevin Blackwell along the way ["They saw me playing for Elgin under 19s, but it just didn't work out for me," he says] and an abortive move to Oldham Athletic as recently as this summer.
The player's parting gift to his former paymasters in Dingwall was his most prolific season yet, with nine goals from midfield (he was deprived double figures due to a deflection against St Johnstone), strikes which were frequently of the eye-catching variety. He has yet to open his account for his new team, however - aside from a pre-season goal against Newcastle - a statistic that has earned him some unwanted attention from his new team-mates and manager Stuart McCall at shooting practice.
"He's on at me all the time for not hitting the target," said Vigurs. "And the boys were on at me at the shooting practice the other day because my shooting was terrible. I don't know what's wrong with me at the moment. I could have had a couple against Kilmarnock and at least one against St Mirren. When I get my first goal, I'm sure it will start to flow. When I do score they tend to be quite memorable ones so maybe I need to score a couple of tap-ins.
"I said I scored 10 last season, but I'm told officially it's only nine as the one I scored against St Johnstone took a massive deflection," he added. "So if I can get anywhere near that tally this season that will be great. To score on Sunday would be perfect."
Vigurs shared a midfield with John Rankin at Inverness and briefly dovetailed with Mackay-Steven in Dingwall, but can also rely on a few hints and tips from his old County pals, who suffered a 4-2 reverse at the hands of United as recently as last Sunday.
"Dundee United will be a tough test," said Vigurs. "But they conceded two fairly simple goals to Ross County last week. So they are good going forward, but defensively I think you can really get at them. It's not like County to lose like that so I'll maybe give a couple of the boys a text before the game for some info."
McCall would also love to see his new player hit the target today - not least because it would remind him of the reason why he first came on to the Fir Park radar in the first place.
"He first came to my attention when he scored a screamer of a volley against us in a 3-0 defeat by Ross County," said McCall. "We might have made a move for him when Jamie Murphy had the chance to go to Blackpool in January, but he decided to stay. But once Jamie, Nicky Law and Kallum Higginbotham had gone, it was a position we needed to fill. I'd actually heard he was joining Oldham, but then I got a call on holiday to say that it hadn't gone through so we stepped in.
"He's technically very good but one thing he can improve on is his goalscoring," McCall added. "He's got a terrific left foot, has great ability, is very creative and sees the right passes. However, he's had opportunities to score in every match and hasn't taken them."
These days, of course, McCall also views players from the point of view of a Scotland coach. While he is wary of putting pressure on Vigurs ["It's not a 'no' by any means but he needs to stick in here - and start scoring goals - before we talk about that," McCall said], the same doesn't always apply to the opposition. Not least of these is Gauld, a 17-year-old who has already had the misfortune to draw rather daunting comparisons with Lionel Messi.
"He [Gauld] just looks like a little boy, like the mascot, but he has an eye for a pass and a good brain … so I want to put as much pressure as possible on him before Sunday. He is Messi in the making and has to live up to that billing!"