Novak Djokovic, 30, is currently recovering from an elbow injury but he has popped into Paris to catch up with his ATP pals this week.
The Serb was given his player pass by tournament director Guy Forget and duly took selfies with him courtside.
Pictures of the moment were posted online on the official Paris Masters Twitter account. They wrote: "Thank you for stopping by, @DjokerNole! #RolexPMasters."
Djokovic, meanwhile, joked: "This is the first time I have a player credential when I'm not playing."
Fans won't see Federer in action this week but they will get a chance to watch Rafael Nadal go for his first Paris title.
The Spaniard needs just one win to guaranteed the year-end no.1 spot after the Swiss pulled out citing a back injury.
Other tennis nuts were more excited to see Djokovic closing on a return to tennis, however.
One wrote: "We miss you so much." Another added: "Nole we cannot wait for your return to tennis! Come back healthy and happy!"
Guy Forget handed Novak Djokovic his player pass
A fellow supporter tweeted: "I hope you're all healed up, I miss watching you play ❤are counting the days."
That sentiment was echoed by another, who wrote: "You are missed so much @DjokerNole , come back soon."
Djokovic hasn't played since Wimbledon where he had to retire during his quarter-final clash with Tomas Berdych.