Will the Six Kings Slam go ahead? Withdrawal of one player could end the richest event in tennis

The countdown is on to the richest event in tennis, but there has to be a huge cloud of uncertainty hanging over this year’s Six Kings Slam. Carlos Alcaraz, Novak Djokovic, Alexander Zverev, Taylor Fritz, Alex de Minaur and Learner Tien are all scheduled to play in an exhibition event in Saudi Arabia that offers a $1.5 million appearance fee for each competitor. That money could be collected from playing just one best-of-three-set match in Riyadh, but the challenge for event organisers this year is the current security issue in the host city.