But Wilkinson and her players will no doubt question whether this should have been the moment their undoubted progress was rewarded with a scalp.
Both players and the head coach had said they were relaxed that they had yet to win in this campaign against sides who will also be appearing in Switzerland this summer.
And they had referred to fine margins that had cost them in games against Denmark in Cardiff last month and in the impressive 1-1 draw with Sweden last month.
But Fishlock certainly appeared to have ensured Wales got over that fine line when she followed up on Ceri Holland’s 21st minute shot, the ball appearing to have been completely over the whitewash before Stine Ballisager’s clearance.
The effort – which had followed a lovely, sweeping move – had been Wales’ first chance of note after an intense opening period of pressure.
Indeed, Denmark could have easily been ahead in the early stages with former Chelsea forward Harder heading against the bar after just seven minutes and goalkeeper Olivia Clark – one of five changes from the draw in Gothenburg last month – doing well to push Amalie Vangsgaard’s shot over soon after.
Wales looked rattled, especially having also seen Manchester City teenager Mayzee Davies helped off the pitch in some discomfort after just four minutes. On crutches at the final whistle, every injury is now a greater concern with the Euros opener less than five weeks away.