Leeds Rhinos full-back Zak Hardaker has questioned the legality of Rangi Chase's tackle in Sunday's 14-12 defeat to the Castleford Tigers.
The former Featherstone Rovers man was knocked out in the second half of the loss at the Wish Communications Stadium following a collision with the New Zealand-born England international.
Hardaker suffered a concussion and had to be helped from the field of play with winger Ryan Hall filling in at full-back for the remainder of the contest.
The use of the shoulder charge in the game is at the centre of an on-running debate and while the 21-year-old loves a big hit like anyone else, he felt there was use of the elbow in Chase's tackle.
"Don't get me wrong, I love a big hit. But when the elbow hits the end of your chin, something's saying it wasn't a good tackle! Just saying," he wrote on his Twitter account.
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