- Extra substitutes rule so far widely shunned by 211 Fifa nations
- Japan, US, Netherlands and Portugal have also enacted ruling
World football has widely spurned the opportunity to introduce concussion substitutes to the game, with just five countries trialling the measure.
English football has implemented the measures approved last year by the game’s law-making body, Ifab. The Premier League and FA Cup have both carried out trials this season, as have the Women’s Super League and Women’s Championship. But only two other European countries have followed suit: the Netherlands and Portugal. Elsewhere only Japan and the US among Fifa’s 211 member associations have also started trials.
