The Hammers got used to the Olympic Stadium pitch this morning as they look to overturn their 2-1 first leg defeat against the Slovenian side.
Work still seemed to be going on today as builders put the finishing touches to the Irons’ new home in Stratford.
The huge lettering was put on the top of the stadium yesterday using cranes.
And the training pictures today give us a behind the scenes look at the magnificent arena.
Click through the gallery above to see West Ham training at the Olympic Stadium.