Manchester United fans were left frustrated after Gary Cahill's injury allowed his former club Chelsea to take an early lead against Crystal Palace.The Blues are in a race with United to claim a Champions League place and when Cahill suffered a hamstring injury, he instantly hit the deck and allowed Willian to race on to a through ball unchallenged.The Brazil international pulled the ball back for Olivier Giroud to sweep home to put the visitors ahead after just six minutes.Red Devils supporters were hoping that Roy Hodgson's team would perhaps do them a favour by taking points off Chelsea.And when they saw Cahill succumb to a hamstring injury against his former club, many of them took to social media to air their grievances."Jasus Gary.
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