Erik ten Hag was reunited with a manager he knows well from the Netherlands, new Liverpool boss Arne Slot. Is is the ‘new manager bounce’ or is Arne Slot simply a more effective tactician and manager than Erik ten Hag? The new Liverpool manager coached his team to a 3-0 victory at Old Trafford, which United fans feared mid-game could get even more embarrassing. In just his third Premier League game, Slot beat Ten Hag. It’s not a good look, with United already suffering a second defeat of the season. Yet it must also be remembered, for those trying to bury the under-fire United manager, that in…