Novak Djokovic surprised the tennis world by turning up to an ATP 250 tournament on Sunday.
After skipping the Paris Masters, the world No. 5 was spotted in the stands of the Belgrade Open which is being staged at his Novak Tennis Centre.
It comes as his ATP Finals chances remain up in the air. Djokovic is currently sixth in the race to qualify but appears to have ended his season and has been tipped to pull out.