Louis van Gaal accused Alexis Sanchez of diving during Manchester United's match against Arsenal on Sunday by mockingly falling over in front of fourth official Mike Dean.
The Dutchman drew huge cheers from the Old Trafford crowd when, after an argument with Dean, he suddenly collapsed on to his back in an apparent demonstration of what he had seen.
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Unfortunately for Van Gaal, his unique form of protest did little to persuade Dean, with a bewildered Arsene Wenger watching on from the visiting technical area.