West Ham have urged supporters to be on their best behaviour when Eintracht Frankfurt visit the London Stadium on Thursday, as the club gears up for its biggest game in decades.
The Hammers host the German club in their first European semi-final since 1976, but there is potential for trouble around the Europa League tie, after West Ham and Frankfurt fans clashed when their sides played last-16 ties in Seville in the same week last month.
