Liverpool trailed at the interval on Saturday afternoon, with Jonathan Walters’ 44th-minute header the difference between the sides as Jürgen Klopp’s team adapted to a different formation at the bet365 Stadium.
They continued with the new system in the second half, though with Philippe Coutinho and Firmino introduced from the bench, and successfully upped their game to produce a crucial turnaround.
The substitutes were the goalscorers, too, as Coutinho’s cool finish levelled the match before Firmino summoned a sublime strike moments later to secure three points.
Wijnaldum was as impressed as anybody by the genius of the No.