 Because of such turfs' superiority in other features compared to the earlier turfs, it has been seen as easier to build new stadiums for each sport rather than attempt to share an inflexible turf installation among multiple sports.Some 21st-century multi-purpose stadiums, such as Tottenham Hotspur Stadium and State Farm Stadium, have developed a more elaborate method of placing an entire playing surface, such as a grass surface for association football and an artificial turf one for gridiron football, on one or more slabs (one at State Farm, three at Tottenham Hotspur) and towing the slab(s) in and out of place for each sport.Because of the expense of using this method, it is generally only used for the highest-level professional sports.