Manchester United duo Luke Shaw and Fred will find themselves walking a disciplinary tightrope if they recover from their respective injuries in time to face Chelsea on Sunday afternoon at Stamford Bridge.
Shaw, who has provided two assists in 15 appearances for United this season, is in danger of missing the trip to west London after suffering a second concussion injury in as many games against Watford last weekend.
The left-back, who was forced to miss England's two fixtures over the recent international break as a result of the blow to the head he suffered in the 2-0 defeat to Manchester City, was forced off inside the final 10 minutes against Watford last weekend, also missing Tuesday's trip to Villarreal in the Champions League.
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