Michael Carrick patted his chest and gave an apologetic salute to the Manchester United fans who were applauding him, before trudging down the tunnel at the end of another bruising afternoon at Old Trafford. Then came a chorus of boos for the United players walking behind him. United had just lost 3-0 — again — to Bournemouth in the Premier League and the disgruntled home support was letting it be known who they were behind in this latest sorry episode at a team that, not too long ago, was the p