Rafael Nadal will play David Goffin in his opening ATP Finals match on Monday.
world No 1 Nadal has been grouped with Belgium’s Goffin, Dominic Thiem of Austria and Bulgarian Grigor Dimitrov.
The first group begins on Sunday, with six-time Swiss winner Roger Federer playing Jack Sock of the USA, and Germany’s Alexander Zverev against Czech Wimbledon finalist Marin Cilic.
The best eight qualified singles players and doubles teams from the tour go head-to-head for the prestigious end-of-season titles.
Each player competes in three group matches, playing for a spot in the semi-finals.
Britain’s defending champion Andy Murray misses out after ending his season early through injury.
Nadal, who has won six titles this year including the French and US Open, has already guaranteed top spot in the world rankings this season.
He pulled out of the Paris Masters earlier this month with a knee injury and said he would “do his best” to return for the Finals.
In the doubles draw, Britain’s Jamie Murray and his partner Bruno Soares will start their quest for the trophy against the American Bryan brothers.