Liverpool are flying back to England after comfortably beating Manchester United on Sunday. The Reds have had a productive two week stay in the USA, winning three out of three matches. For Arne Slot, it has been a perfect start to life at Liverpool. Wins over Arsenal and United should act as a big confidence boost ahead of the new season. Slot will also likely have been pleased with the shape of his Liverpool squad. Even with so many first-team players still missing, those who were available have stood up to be counted. As the Reds return to the AXA Training Centre, though, the Dutchman will s…