The failure to add more goals against the lowest-ranked side in the competition is likely to gnaw away at those old enough to remember the World Cups of 1974, 1978 and 1982 when Scotland exited on goal difference.

The flip side is the Scots are just one good performance away from making history by progressing to the knockout stages for the first time.

With 32 of the 48 nations going through, a point against either Morocco or Brazil - who drew 1-1 on Saturday night - will almost certainly guarantee progress. Three points could well be enough if the goals against tally is low.

Might that mean we see a more cautious approach in the next two games?

Clarke went with two strikers against Haiti and former Scotland skipper Scott Brown expects one to drop out for the remaining Group C matches.

"I think [midfielder] Ryan Christie starts in both of them," he said. "I think we end up going back to one up front and we'd be a little bit more compact in the middle of the park.

"Ryan was fantastic when he came on. He'll keep the ball, gives you that extra bit of legs and he fights for you as well.

"Are we going to have as much possession, as many opportunities against Morocco and Brazil?"

Neil McCann reckons a lone striker is the answer and suggests Lyndon Dykes is best suited to the role.

"He gets knock-downs, he holds it up for Scott McTominay and John McGinn to get beyond," McCann said.

Another former Scotland winger, Pat Nevin, also expects a change of system, but reckons Clarke will opt for an extra central defender.

"A 4-4-2 doesn't suit us, the midfield is left completely wide open," he said.

"I think we need a back three. Morocco are so fluid and fast in attack. A back four against what they've got is difficult."