Novak Djokovic and Roger Federer are both drawn in Group B, along with Juan Martin del Potro, for this year's ATP World Tour Finals.
Novak Djokovic and Roger Federer have been drawn together in Group B for this year's ATP World Tour Finals.
The pair, who both reached the semi-finals of the Paris Masters earlier this week, are joined by former US Open champion Juan Martin del Potro.
Frenchman Richard Gasquet, who will be the lowest-ranked player competing at the event, is also in Group B.
Group A will feature David Ferrer, Tomas Berdych, Stanislas Wawrinka and world number one Rafael Nadal.
Berdych qualifies for Tour finals >