Liverpool turned in a good display to signal that they can still go toe-to-toe with the best sides in the Premier League on Thursday. Of course, you cannot and should not read too much into pre-season friendlies, whoever they are against. But it’s safe to say that a win over Arsenal will do wonders for the confidence around Anfield heading into the new season. Arne Slot got his tactics right against the Gunners to resign them to a friendly defeat in Philadelphia. But while Mikel Arteta praised Slot and his set-up after the game, the Liverpool boss was helped by some outstanding individual perf…