Liverpool rounded off their pre-season tour of the USA with a resounding win over Manchester United on Sunday. The Reds had their confidence up following a 2-1 victory against Arsenal on Thursday and backed that up by demolishing their arch rivals in South Carolina. For Arne Slot, it was the perfect introduction to life at Liverpool playing Premier League teams. It was not all good for the Reds, though. They had to rely on some brilliant goalkeeping from Caoimhin Kelleher and Vitezslav Jaros to keep them ahead. But having seen his team beaten so comfortably, Erik ten Hag offered his verdict on…