Liverpool will be waiting a little nervously for the January transfer window to open. The Reds have done some great business in the winter market over the years, with the likes of Virgil van Dijk, Philippe Coutinho and Luis Diaz arriving. However, while Arne Slot may still add to the Liverpool squad, he will perhaps be more concerned with batting off overtures from elsewhere for three of his players. As things stand, Van Dijk, Trent Alexander-Arnold and Mohamed Salah could all agree deals with European sides in less than two months’ time. Perhaps the most worrying of those situations is in reg…