It’s interesting how Mav’s fans complain about DeAndre Jordan...
Deandre Jordan has a -7.2 defensive field goal percentage for players within 6 ft. Meaning opponents shoot over 7% less with Jordan guarding them. DeAndre Jordan averages 5.7 defensive boxouts a game. If a player gets by the guards DJ averages 1.0 block a game.
By comparison, Doncic has a plus 5.1% defensive field goal percentage for players within 6 ft. And despite playing the 4, Luka chases rebounds and rarely boxes out his man. Luka averages .7 defensive box outs a game. Luka isn’t much help protecting the rim either averaging .3 blocks a game.
In short, DJ is covering Luka’s ass on defense with little help. If Luka were playing the 3 and defending the perimeter than these numbers wouldn’t matter. But he rarely guards on the perimeter in the games I saw and is a defensive sieve whose sole job is to chase rebounds while others box out.