With Liverpool already leading thanks to Mohamed Salah's 12th-minute goal, Oxlade-Chamberlain soon sparked delirium at Anfield.
With 20 minutes gone, the hosts worked the ball to the midfielder 25 yards out and what came next was special.
Oxlade-Chamberlain gathered the ball before powering a wonderful effort into the far corner of Ederson's goal with one of the cleanest strikes you are ever likely to see.
Check out the strike for yourself below:
April 4, 2018
Pep Guardiola barely reacted after the goal, despite his side being more than a bit under the cosh and seeing their hopes of a treble left in ruins.
April 4, 2018