Why Jota's Merseyside derby goal was given

Should Diogo Jota's goal for Liverpool have been ruled out for offside, or should Luis Diaz have been flagged for offside? Former England goalkeeper Joe Hart explains why - by the letter of the law - the goal was legitimate, but frustrating all the same.

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READ: 'Reckless' tackle & 'offside' goal - were Liverpool-Everton officials wrong?