Manchester United fans have been left fuming after Arsenal scored a controversial opener in the early stages of their Premier League clash.Emile Smith Rowe's driver shot from the edge of the area flew into the back of the net, but David De Gea was left prone on the ground.Following an Arsenal corner, Fred had landed on De Gea's foot, causing the Spaniard to fall to the ground.And referee Martin Atkinson didn't blow his whistle until the ball nestled in the net, leaving him with no option to allow the goal.United players were furious with Atkinson as they were forced to restart the game."I suppose fair play doesn't exist anymore then," one fan fumed after Arsenal played on following the kick-off.Another added: "Deep down Arsenal people know.
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