Seven-time Dubai Duty Free Tennis Championships winner Roger Federer has been drawn with Novak Djokovic at the ATP Finals tournament.
Meanwhile, world number one Rafael Nadal is in the same group with Daniil Medvedev, who he'll play at next month's Mubadala World Tennis Championships in Abu Dhabi.
Stefanos Tsitsipas and Alexander Zverev are also in their group.
The season finale gets underway on Sunday at London's O2 Arena.

Sarfaraz named Pakistan's test coach for Bangladesh series
Coventry promoted to Premier League after 25-year absence
Gujarat sink Kolkata with adaptable bowling in IPL
Alcaraz pulls out of Madrid Open for second straight year
Injured Djokovic to miss Madrid Open
