Elena Sadiku had hoped the sub-zero temperatures would test Real Madrid, but the Spanish side looked right at home in Hamilton.
At times, Colombia international Linda Caicedo looked like she was gliding on ice. Scurrying with positivity and purpose down the left, the young superstar left Celya Barclais in a spin.
And that’s just one of the many world-class talents and assets manager Alberto Toril has at his disposal.
While Caroline Weir was still here, there and everywhere, she was tightly marked by fellow Scotland international Shannon McGregor, who once more caught the eye in this competition.
As did Celtic as a whole, but only in glimpses. For their bright moments were quickly evaporated with swarms of Real Madrid attacks.
On matchday one against Twente, the takeaway was that small margins matter. The memo remains.
With a trip to the Netherlands to come next week, it would be harsh for a side who have had their sparks to sit on zero points.
But this level is harsh, and Celtic are learning that the hard way.