Nadal vs Alcaraz LIVE! Rafael Nadal and Carlos Alcaraz will go head to head one last time in Saudi Arabia tonight. The Spain duo are set to square off in the second semi-final of

RIYADH, Saudi Arabia (AP) — 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 an exhibition event that awards money but no ATP ranking points and is Saudi Arabia's latest foray into tennis.

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.

Carlos Alcaraz, winner of four majors, crushed the Dane Holger Rune (6-4 and 6-2) in his first game and now will face Nadal in the semi-finals of the tournament with this set to be the last ever game between the two idols of Spanish tennis, with the Davis Cup in Malaga next month set to mark Nadal’s definitive farewell from the sport.

Nadal will skip the quarter-final round at the Six Kings Slam and battle against Carlos Alcaraz or Holger Rune in the semi-final. The 22-time Major champion will end his career at the Davis Cup Finals in Malaga between November 19-24, competing in the national jersey two decades after debuting.

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.

The exhibition tournament held in Riyadh, where the winner takes home six million (more than double the US Open), will be the penultimate for the Balearic player before his retirement in the Davis Cup Rafa Nadal,