West Ham United manager Julen Lopetegui may well have a really big problem on his hands this summer. That’s because the Hammers boss could end up being forced into playing someone who he might not have given many minutes to otherwise. Julen Lopetegui took over as the new West Ham manager this summer, and he has serious amounts of work to do at the London Stadium. With up to 12 Hammers first-teamers being linked with the exit door, the Spaniard has a huge rebuild on his hands. Lopetegui needs to strengthen in pretty much every single position this summer, if we’re going to make any kind of prog…