Louis Ferguson – in his first match in Scotland for about a year after returning from knee surgery – was keen to highlight the “dirty side” of the performance.
“We knew that we would have to overcome the storm,” said Bologna leader.
“We could have been quieter on the ball, but you need to show this side of the game if you've gets out of the home – the dirty side, running, processing, ban, head.”
Scotland could be at the end of the screen in the first half.
Billy Gilmore stole on a large scale, Che Adams fired directly at Konstantinos Tscalate with his mercy, then Turin striker launched another goal on the face of the goal as Scotland was repeatedly harmed Greece in transitional moments.
Clark praised how their players disturbed their hosts, but they did not take anything for granted before Sunday at Hampdeen – Live on the BBC – where Scotland tries to maintain their highest position in the Nations League.
“The first half was really good, we could be at the forefront,” he added. “If you are greedy, I can say three. This game has not died yet. In any way.”