Mohamed Salah, Alex Oxlade-Chamberlain, Georginio Wijnaldum and Dejan Lovren all decided to take part in the mini-tournament once the day's drills had been completed.
What transpired was a highly entertaining - and competitive - shoot-out between the quartet.
But who was the winner and which player was forced to complete a forfeit?
Find out the answers in our must-see video below now, which is free to view.