straight to your inbox every day for freeManchester United risk aggravating Marcus Rashford's shoulder injury as they prepare for eight games in 24 days this month.Rashford hurt his shoulder in United's 3-1 win at Everton three weeks ago that ruled him out of England duty and the 23-year-old was forced off in the second-half of the midweek defeat to Paris Saint-Germain.Rashford played on with a back injury into January of last season until he suffered a stress fracture that ruled him out until