Liverpool are heading into the final week of July without having made a single signing this summer. The Reds are now one of only two Premier League sides who are yet to add a new senior player to their squad since the end of last season. Of course, there are a number of reasons for that. However, it should be pointed out that they are not the only club in the division who are getting to grips with having a new head coach. Arne Slot has been given time to assess the Liverpool squad and that has been tough to do with so many away on holiday. But, again, the Reds are not alone in having to make d…