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Published 11:45 3 May 2017 BST
Updated 12:21 3 May 2017 BST

"On the first go, they [referees] were very reluctant to put a player off whereas, in this particular instance, they're enforcing it a bit more stringently.”Portugal legend Luis Figo proposed the sin bin rule when he intended to run for FIFA Presidency in 2015.
The aim of the rule is to reduce unsportsmanlike behaviour in the game and O’Connor said he could notice a difference when participating in the tournament back in 2015.
"The Danish lads were very reluctant to tackle because of the rules whereas I just told our players to make their tackles as they usually would and, if it's a yellow card, then so be it.”Clubs in England are usually fined £10 per yellow card but will not be charged if they participate in the trial.