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.

Anisimova outlasts Swiatek at WTA Finals to join Rybakina in semis
City's Haaland haunts former club Dortmund, Foden nets two in 4-1 win
AC Milan, Inter complete acquisition of San Siro for new stadium project
Pant returns to India squad for test series against South Africa
Mac Allister heads Liverpool to Champions League win over Real Madrid
