Cristiano Ronaldo was left red-faced before Manchester United's clash with Young Boys after accidentally KO'ing a steward.Ronaldo, 36, fired an attempt wide of goal in the warm-up ahead of United's opening Champions League group-stage fixture out in Switzerland on Tuesday night.Instead of flying into the back of the net, the Portugal captain's wayward effort smacked a female steward standing on the sidelines at the State de Suisse and sent her tumbling to the ground.Other stewards quickly rushed to the scene to help their injured colleague before Ronaldo himself jumped over the barrier to go and check she was not badly hurt.Once he knew the steward was well, he ran back onto the pitch to continue his warm-up before the game.Fortunately for.
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