"I wouldn't weight it one way or the other," Kristick said. "Covered stadiums create more challenges if the roofs are not retractable, from the standpoint of the requirement to have natural grass that not only is able to be installed in the facility but maintained at a standard that can withstand the amount of play that you're going to have a World Cup. If the roof is retractable, that issue is far less of one to worry [about]."