Karen Khachanov and Andrey Rublev have been confirmed to play in the Mubadala World Tennis Championship which gets underway in Abu Dhabi on Thursday.
The Russian duo replace Daniil Medvedev and Gael Monfils in the men's draw after both were forced to withdraw through injury.
The 12th edition of the tournament, which takes place from Thursday to Saturday, features World numbers 1 and 2, Rafael Nadal and Novak Djokovic, as well as Maria Sharapova.
Recent ATP Tour Finals champion Stefanos Tsitipas gets proceedings underway on Thursday when he takes on Rublev from 4 o'clock.


Man City reach League Cup semis, late Newcastle goal downs Fulham
Mbappe edges closer to Ronaldo record as Real survive Copa del Rey test
MI Emirates hold on to stun Dubai Capitals by seven runs
Games of the Future open in Abu Dhabi
FIFA agrees 50% rise in prize money for 2026 World Cup
