• Fifa still to confirm length of show despite requests

• Delay is causing issues for advertising teams

World Cup TV rights holders are growing increasingly frustrated at Fifa’s failure to confirm the length of the half-time show at next month’s final.

Madonna, Shakira and the K-pop boyband BTS have been booked to perform at the MetLife Stadium in the first half-time spectacle at a World Cup final, curated by Coldplay’s Chris Martin, who put in a surprise performance at last year’s Club World Cup final at the same venue when the break in play lasted 24 minutes.