Rafael Nadal is the top seed for the penultimate tournament of the ATP season, which begins on Saturday with qualifying matches.
The world number one skipped the Swiss Indoors in Basel this week after announcing he was struggling with an “over-stressing of the knee”.
But should Nadal confirm his participation in the event, he will have a bye in the first round before meeting the winner of Mischa Zverev and Hyeon Chung in the second round.
Roger Federer is the second seed and in the bottom half of the draw.
The Swiss star is currently in Basel and his involvement next week is uncertain.
Should Federer opt to skip the event, his hopes of catching Nadal in the race for world number one will lessen.
The tournament will be the final chance for David Goffin, Pablo Carreno Busta, Sam Querrey, Kevin Anderson, Juan Martin del Potro and Jo-Wilfried Tsonga to push for a place in the season ending World Tour Finals in London.
The top 16 seeds all have byes into the tournament.
Andy Murray, who is the defending champion, is among several players including Novak Djokovic and Stan Wawrinka who will miss the event with injury.
Selected first round ties –
Kyle Edmund v Lucas Pouille
Adrian Mannarino v David Ferrer
Richard Gasquet v Beniot Paire
Gael Monfils v Palolo Lorenzi