Manchester United boss Erik ten Hag has given himself an enormous boost having beat Manchester City in the FA Cup final on Saturday. Much of the build-up heading into the game surrounded the future of Ten Hag. Rumours of a sacking and a plethora of potential replacements threatened to ruin United’s chances of a Wembley victory against bitter rivals City. Ten Hag and his players put all of that speculation to one side though and produced the most joyous afternoon of a testing season. Alejandro Garnacho and Kobbie Mainoo – two young players who have been exceptional all season long and have give…