Regarding Jokic's defense:
- The Nuggets are 10th in Defensive Efficiency
- Jokic is +3.7 in DBPM according to BRef
- Jokic is +1.9 in DRPM according to ESPN*
- Jokic's DRTG per BRef is 105**
- The Nuggets give up 1.1 PPP during Jokic's minutes this year per NBA Wowy
- Jokic is tied for 10th (with Anthony Davis) for DRB%, minimum 24 mpg
*(this does rank him 26th among centers but he ranks one spot ahead of Steven Adams)
**This would rank 6th in the league for a full team
Overall I would say that the numbers suggest Jokic is not an amazing defender, but he's far from the liability on that end, despite how many people still seem to see him. In particular I would say that defensive rebounding is underrated and blocks are wildly overrated.
With that said, the Nuggets also have a great home court advantage and have done a very good job scheming their defense around Jokic.
None of this means Jokic is better than Anthony Davis, to be clear, although I would say that availability should be part of that equation. Davis averages about 65 games played per year while Jokic averages about 75.