West Ham take on London rivals Chelsea in the Premier League and one of their new players has just stoked the fire. The rivalry between West Ham and Chelsea may not be as intense as it once was. But make no mistake beyond Millwall and Spurs, there’s no love lost between the Hammers and the Blues on or off the pitch. West Ham and Chelsea both have new managers who in the spotlight this season. Julen Lopetegui must prove he can succeed where David Moyes failed – by combining style with substance at the London Stadium. And former Hammers assistant coach Enzo Maresca must prove he can do something…