This week, six of the biggest stars in tennis descended on Riyadh for the inaugural “6 Kings Slam,” a new event that is offering the biggest cash prize in the sport’s history. Each of the six competitors - Novak Djokovic, Rafa Nadal, Jannik Sinner, Carlos Alcaraz, Daniil Medvedev and Holger Rune - is fighting to claim the $6 million on offer to the tournament’s winner; that amount is almost double the prize money awarded to a Grand Slam champion. Here, Al Arabiya English explains everything you need to know about the 6 Kings Slam. What is the event? The 6 Kings Slam is an exhibition tennis tournament that, despite not offering any ATP ranking points - has attracted a sextet of sporting stars to Saudi Arabia for one of the headline events of Riyadh Season. Its Hollywood blockbuster-style marketing video went viral for its depiction of Djokovic, Nadal, Sinner, Alcaraz, Medvedev and Rune as Kings of different lands heading into battle. The tournament is being played at an 8,000-seat,