By Tom Gott Manchester United booked their place in the fourth round of the Carabao Cup with an emphatic 7-0 victory over Barnsley. Marcus Rashford opened the scoring early on and United never looked back, with Antony netting a penalty and Alejandro Garnacho popping up with a third before the interval. Garnacho and Rashford were both on target early in the second half, before Christian Eriksen netted twice late on to cap off a dominant victory for Erik ten Hag’s side. How the game unfoldedBarnsley showed little fear in their approach to the game but it was United who stamped their authority on…