Hello
This will be the 22-time Grand Slam champion's fourth appearance at the three-day team tournament, which pits six top men's players from Europe against six of their counterparts from the rest of the world.
Nadal, who has won 22 Grand Slam titles, added that the future of Spanish tennis was in good hands with the 20-year-old.
The Spaniard hopes to compete at this year's French Open and the Olympics.
Carlos Alcaraz, Jannik Sinner, Daniil Medvedev and Holger Rune will also play at the 'Six Kings Slam', which will form part of the Saudi cultural and entertainment festival Riyadh Season.
Nadal's absence from the Australian Open could mean he has played at Melbourne Park for the last time.
Nadal said the pain is in the left hip, which caused him to miss so much time away from the court, but it may not be the same issue.
The 22-time Grand Slam champion overpowered Kubler in 83 minutes to book his place in the last eight.
Nadal marked his singles comeback after hip surgery with a victory over Austrian former world No. 3 Dominic Thiem in the Brisbane International first round..
However, Nadal showed no obvious after-effects of the hip injury that ruined his year.
Nadal had previously said he expected to bring the curtains down on his glittering but injury-plagued career in 2024.