West Ham are in talks with several top European clubs about being their first opponents at the Olympic Stadium in the summer - with Barcelona among them, Sky Sports understands.
Luis Enrique's side are believed to one of the potential opponents for the game, which is expected to be on August 3.
West Ham play their last game at Upton Park - their home since 1904 - against Swansea on May 7 before moving two miles north-west to the 54,000-capacity Olympic Stadium.
And Lionel Messi could be one of the first players to grace the turf if West Ham can secure a pre-season friendly with the Spanish giants.