http://www.goal.com/en-gb/news/how-does-var-work-a-comprehensive-guide-to-video-review-in/4w4m0twmpg3j11tmx1waaehdz
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In other words....eees complicated !
I fear this being the thin end of the wedge. Once its there and becomes routine, the ref will be under pressure to use it more and more when he's not certain of a decision (it already happens in cricket). He'll start using it as a crutch, and we could well get to a point where many goal...
It can only be used to review 4 things:
Goals
Red cards
Penalty decisions
Mistaken identity
There's enough in that little lot to open up a WHOPPING great big can of worms though. Its all well and good when its a straightforward decision, but when its highly debatable even on review is when the...