Arsenal player to be subbed with a green form as part of the Premier League’s new concussion protocol after sustaining a head injury during their 1-0 defeat by Manchester City on Sunday afternoon.The Gunners centre-back was forced off after shipping a knee to the head from City’s Joao Cancelo, which left him visibly dazed at The Emirates.Fortunately for Mikel Arteta he could rely upon the Premier League’s concussion-substitution trial to replace him with David Luiz, which did not count as one of his usual three subs.Holding is the first Arsenal star to have been brought off using the green form, making history for the north London club.The new rule, which is being trialled until the end of the 2020/21 season, gives teams the chance to make.
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