Bayer Leverkusen boss Xabi Alonso has named five West Ham stars he’s worried about and one may well surprise you. Much of the focus ahead of West Ham’s Europa League quarter-final clash with Bayer Leverkusen has been on the German champions-elect. That’s understandable. Bayer go into the Hammers clash 41 games unbeaten and are clearly one of the best sides in Europe. There’s the obvious players West Ham must watch out for such as Florian Wirtz, Granit Xhaka, Patrik Schick and Victor Boniface. How about Europe’s most accomplished attacking full-back duo Alejandro Grimaldo and Jeremie Frimpong. …