Robbie Rotten wrote:
if they were to bring in a referral system of some sort, surely it would be a bit easier if the coaching staff can watch on the sideline before they refer it, or would it be an on-field decision only?
I think that may depend on who would decide whether to challenge or not. If it was left to the players who would be near the action, then have no monitors. If it was down to managers/coaching staff to make the decision, then it would probably be beneficial to have monitors just for that as they won't be able to see every thing clearly from the sidelines.