The Premier League will introduce concussion substitutes from February 6, it has been confirmed.
The long-awaited trial was approved last week and the top flight is set to become the first division in the world to test out the measure.
From February 6 - or matchday 23 in the Premier League - teams will have two permanent concussion substitutes per game.
Fears were raised over welfare of players earlier this season after a number of sickening head clashes - with the incident involving Raul Jimenez and David Luiz among those to have sparked action.