Novak Djokovic and Jannik Sinner will battle in a blockbuster semi-final at the Six Kings Slam in Riyadh. The Serb returns to Saudi Arabia a year after fighting against Carlos Alcaraz, hoping for another memorable duel against the world's best player.

Novak Djokovic and Rafael Nadal, who own 46 Grand Slam singles titles between them, will be among the tennis stars competing for the largest purse in tennis history.

Rafael Nadal starts his pre-retirement farewell tour against Carlos Alcaraz on Thursday at the Six Kings Slam, and Novak Djokovic faces Jannik Sinner at the exhibition event that awards money but no A

The Six Kings Slam is an exhibition event for a half-dozen men that awards money but no ATP ranking points and is Saudi Arabia’s latest foray into tennis.

Rafael Nadal and Carlos Alcaraz do battle today for what will surely be the final time. Nadal recently announced that he will retire from tennis at the end of the season, with his final appearance coming when he represents Spain in the Davis Cup finals next month in Malaga.

The Six Kings Slam is the most lucrative exhibition tennis tournament ever, taking place in Riyadh, Saudi Arabia, as part of the country’s annual sporting season.