Last June, as the full-time whistle ebbed away into the night above Spain's Huelva Stadium, Mackenzie Arnold picked up her water bottle, stared into one of the clinically bright floodlights, and let out a deep sigh.
The Matildas goalkeeper had just conceded six goals, including three in less than 15 minutes, in what was one of her worst-ever tallies in a single game for club or country. And she had only come onto the pitch at half-time.
