Djokovic, who has been busy organising an exhibition tennis tournament in the Balkan region while the professional season is suspended due to the novel coronavirus, posted a video of himself trying some basketball moves on social media.
The video, addressed to James, shows the 33-year-old Djokovic taking a few dribbles before knocking down a mid-range jumpshot.
"Am I ready for a 1:1 @KingJames?" asked Djokovic, who previously termed Kobe Bryant, the 18-time NBA All-Star who died in a helicopter crash in January, a great mentor and friend.
The NBA star did not take long to respond.
"Ha! I'm going to say I think you are!! Beautiful follow-thru on that shot buddy!" James said in his reply on Twitter.