Liverpool's players were spotted training with brain sensors on their heads as they prepared to take on Real Madrid in the Champions League final.
The Reds will take on the Spanish champions for the second time in five finals, having been beaten by Los Blancos in 2018. Jurgen Klopp's men overcame Villarreal in the semi-finals to book their place in Paris, while Carlo Ancelotti's side left it late to stun Manchester City in the last four.
If they want to go one better than in 2018 - or, indeed, 2021, when they lost to Real Madrid in the quarter-finals - Klopp's players will need to be at their best. And the Reds are looking for every edge they can find.