The Premier League is not expected to opt in to VARs being able to rule on incorrectly awarded corners. Fifa referees' chief Pierluigi Collina says there will be further trials of a challenge system as part of a two-year review of the video assistant referee (VAR).

The International Football Association Board (Ifab) announced the review at its annual general meeting on Saturday - the 10th anniversary of its initial approval of VAR trials. Football Video Support (FVS), which allows coaches to make two challenges per match, is already being tried out in Italy, Malta and Spain.

Collina, who chairs the referees' committee of world football's governing body, said it was likely those trials would be replicated elsewhere. "It is probable that in the next weeks we will open the possibility to join the trial for the next season to member associations and competition organisers," he said.

The very existence of VAR has been questioned at times this season in particular, with many claiming the game would be better without it. Collina, who was voted the world's best referee five times, said: "In Italy, we say that in every wonderful marriage, there is a crisis after seven years. "So it might be possible that people fall in love with the VAR, and then after some years... crisis."

Wider VAR scope and more countdowns for World Cup The big VAR debate: with, without or change its scope? Football Association chief executive Mark Bullingham said in any assessment of VAR, it was paramount to "keep the game flowing" and "we don't want to see more delays".

Bullingham said the FA was against VAR checks on corners - which have been approved for use at this summer's World Cup - and the competition opt-in would not be used in England. But he is supportive of a challenge system. "It changes the dynamic," Bullingham said. "It reduces the amount of times when there is a VAR intervention and effectively puts the onus on the coach. "That's something which we might continue to learn as we trial that model.

"Parts of the game [that use FVS] fundamentally can't afford for VAR at the moment. "But that doesn't mean it's necessarily the wrong model for the future."

Follow your club with BBC Sport. Listen to the latest Football Daily podcast. Get football news sent straight to your phone.