Organizers said Tuesday that Federer and Nadal have committed to play in the three-day event starting Dec. 31. The tournament, which is not part of the ATP Tour, offers a winner-take-all prize of $250,000.
The event, organized by Abu Dhabi-based real-estate developer Capitala, features six players.
Britain's Andy Murray won the inaugural event last year, beating both Federer and Nadal.
Nadal training again after knee injury layoffLa Liga round-Up
