Novak Djokovic and Rafael Nadal will headline a new exhibition tournament in Saudi Arabia, organisers said, as debate swirls about tennis’s push into the conservative country. 

The Serb and the Spaniard, with 46 major titles between them, will be joined by Wimbledon champion Carlos Alcaraz and Australian Open winner Jannik Sinner at the 6 Kings Slam. World No. 3 Daniil Medvedev and seventh-ranked Holger Rune will also play the event in Riyadh in October, oil-rich Saudi Arabia’s latest foray into the sport.