"We expect the referee to protect all our players, not just Mario," said the Reds boss.
"It is a man's game. It is a competitive game but if it oversteps the mark when he's not involved in the build-up then we would expect the referee and officials to look at it.
"But there are no complaints for me. Football is competitive and strong and we ask the players to be that in our team but be fair in the way we work."
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