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Scotland passed up countless big opportunities as they endeavoured to end a seven-game winless run and Clarke acknowledged such openings will be scarce against Germany, Switzerland and Hungary.
“What we learned is that we can create chances and we just need to find the final finish,” the manager told BBC Scotland.
“We need to work on it in training and their confidence in terms of finishing.
“When it comes to Che Adams – bang, goal. That’s the kind of confidence you need to show at this level.”
As Scotland prepare to for a step up in both quality of opposition and size of occasion, these moments will likely prove decisive. Clarke knows it.
As does former Scotland international and Sportsound pundit Willie Miller, who believes the manager has been left with a tough decision.
“For the opening game, who does he go with?” the former Scotland defender asked.
“You’re looking for Shankland to score, but Adams has done what a striker needs to do.”
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