As England and Scotland prepare to resume the oldest rivalry in international football, all the talk is of who will start in the Euro 2020 crunch match.
The neighbouring nations go into the latest instalment of their long-standing rivalry in two very different veins of form after their respective opening matches of the tournament.
The Three Lions impressed in Wembley sunshine against Croatia in their opening encounter of the Euros, which saw Raheem Sterling pop up with the winner for Gareth Southgate's side.
But the England manager's opposite number on Friday night Steve Clarke will be leading the Scots into battle with the Auld Enemy off the back of a 2-0 defeat to Czech Republic.
Will it mean a change in formation or personnel for the Tartan Army? And will Southgate stick with the same side that clinched a first opening game win at the Euros for England?
Who will start for England?
England's preparations for their second group match of the Euros, against Scotland, were given a boost when Harry Maguire declared himself fit and available for selection.
It was welcomed news of arguably England's best and most consistent central defender on the eve of potentially the most anticipated game of the tournament for the two nations.
Yet the Manchester United defender hasn't played a competitive game since suffering an ankle injury against Aston Villa in early May, with question marks over his match fitness.
The pairing of Tyrone Mings and John Stones didn't put a foot wrong against Croatia and, while Maguire is sure to be involved, it would be a shock to see him in the starting line up vs Scotland.
It may be at the other end of the pitch where Southgate opts to shuffle the pack, with star striker and captain Harry Kane below par against Croatia and substituted with 10 minutes to go.
Kane's quality and importance to the team is unquestionable, though, having seen how he tired in the final games of the 2018 World Cup it could be worth saving him for when it really matters.
England are on the cusp of qualifying for the knockout stages already - does Southgate need to lean on a player who has already made 59 appearances for club and country so far this season?
Or could he save him and let Jack Grealish have a free role in terrorising the Tartan Army.
ENGLAND (4-2-3-1): Pickford, Trippier, Stones, Mings, Shaw, Phillips, Rice, Foden, Grealish, Mount, Sterling.
Who will start for Scotland?
The post mortem into Scotland's defeat to Czech Republic at Hampden Park saw Clarke having to explain why he didn't pick Che Adams to start and the thinking in leaving out Billy Gilmour.
Southampton striker Adams made a strong claim to start against England with an impressive display from the bench against the Czechs as Scotland attempted to find a foothold in the game.
Adams can also point to the fact he has gone toe-to-toe with the England defenders at club level in his two seasons with the Saints in the Premier League and not looked out of place.
His support will come from the likes of Scott McTominay and John McGinn, as well as the energetic presence of skipper Andy Robertson down the left flank for Clarke's men.
Robertson could be pushed further forward if Kieran Tierney recovers fully from a calf injury which saw the Arsenal full-back miss the opening game of the tournament.
It would provide a welcome boost to Scotland, as would the inclusion of midfielder Gilmour.
The Chelsea prospect, who turned 20 on the first day of Euro 2020, has the world at his feet and attracted praise from many quarters including Roy Keane and Frank Lampard.
Lampard gave Gilmour his first team debut in August 2019 at Stamford Bridge and has likened the midfielder's attributes to those perfected by England international Paul Scholes.
While there is a place in the back four for Nathan Patterson of Rangers and Scott McKenna of Nottingham Forest in front of the experienced David Marshall in goal.
SCOTLAND (4-5-1): Marshall, Patterson, Hanley, McKenna, Tierney, Fraser, McTominay, McGinn, Gilmour, Robertson, Adams.
England vs Scotland score prediction?
In a game which looks set to be played in tricky conditions, a draw seems the most likely outcome with two teams taking a pragmatic approach to their Euro campaigns.
England to huff and puff for the majority of the game before a set piece play sees Stones head in midway through the second half before lightning strikes late for the travelling Scots.
England take a step closer to qualifying for the knockout rounds and Scotland give themselves a chance of advancing from the group if they can follow it up with a win over Croatia.
Score prediction: 1-1.