Djokovic will get an extra $1.6 million if he plays Paris
The ATP rule book is very clear on this.
As world number one, Djokovic is entitled to a bonus of $2m if he plays all eight of the Masters 1000 events during a season, with that bonus reducing to $1.6m if he plays seven of the eight.
So far, he has played six out of seven having withdrawn from Shanghai last month. If he pulls out of another - meaning only six of the eight played - then that bonus is wiped out, injury or no injury.
According to the rule book, the only exceptions are made for players who reach a certain age or a certain of number of tour matches played. As things stand, there is leeway for Roger Federer and Rafa Nadal but not the man who has dominated them this year.