WWKL is the first international kabaddi league coming out of India and the tournament will see eight teams fighting for the trophy.
The 46-year-old will perform on some of the popular title tracks from his films, Aug 9 and Aug 10 at O2 Arena.
Akshay said his "performance` will be `dedicated` to the kabaddi fans who will come together to cheer the teams.
"The League is a step to promote the Indian contemporary sport and bring it closer to the fans of the sport spread across the world,` the actor, who also co-owns one of the teams, Khalsa Warrior, said in a statement.
Some of the top players from across the world will participate in the tournament.
Pargat Singh, commissioner of WWKL, is confident that Akshay's performance will be a true firebrand opening for the event.
`The dedication being shown by Akshay to promote WWKL is commendable. As a true supporter he is making himself available to us despite his busy schedule to promote kabaddi.
"He is a global star and his fan following is spread across the world. His performance at the inauguration will be a true firebrand opening of the League - we could not have asked for more,` said Singh.
