For Leicester City boss Steve Cooper, it was a genuine moment of top-class quality which set Manchester United on their way to a 5-2 EFL Cup thrashing at Old Trafford. If Erik ten Hag was tuning in somewhere back home in the Netherlands, the former Manchester United boss could have been forgiven for wondering where this sort of finishing had been during his nightmare final few weeks at the helm. Because, just three days after Man United missed close-range chance after close-range against in defeat to West Ham, Casemiro managed to locate the top corner of the Leicester City net with a 30-yard b…