With an hour gone and Manchester United locked in a fifth-round stalemate with Blackburn Rovers as the rain swirled around Ewood Park, Jose Mourinho turned to his bench and summoned Zlatan Ibrahimovic and Paul Pogba.
It was a power play. A graphic demonstration of what separates these two clubs in the modern era. The Championship strugglers had competed gamely until then, even taking a deserved early lead through Danny Graham.
But Marcus Rashford had already equalised when Mourinho rolled out his big guns. The game changed there and then.