Liverpool are edging towards making their first signing of the summer transfer window. The Reds have been ultra quiet since the end of the season, allowing Arne Slot to get a good look at his group of players before making any decisions. But with Slot keen to change the way Liverpool play through the midfield, the Anfield decision makers have decreed that a new holding player should be targeted. On Wednesday, it became clear that top of Liverpool’s list is Real Sociedad midfielder Martin Zubimendi. However, a deal does not look especially straightforward. The Reds could face two problems in th…