Gilmour had been on for four minutes, and the difference was already visible.
His arrival brought a wave of comfort for the Brighton players in a way that Dahoud hadn't been able to do.
His passing wasn't just passing; it was organisation, each ball telling the players around him where to be for the next one, and Brighton began to move differently.
But he wasn't the only one.
The other substitution, Julio Enciso, added something different.
In that same time frame, he shot the ball on target twice, causing Ben Amos to tune in and the Wigan defence to switch on.
"Wigan need to find something soon," the commentator said, noting the change as the game went on.
"Brighton are beginning to click and when they click it is going to feel like a whole new proposition."
Leo took his breath when the ball went out for a throw, hands on his hips, looking around at his teammates.
