3-point defense
By now, it's no secret that the Nuggets are struggling to defend the 3-point line. The team is currently 29th in opponent 3FG%, allowing opponents to shoot 39.8% from deep on nearly 26 attempts per game. On average, opponents are shooting 7.1% better from behind the arc against the Nuggets than they are against the rest of the league.
It's an area of significant concern and head coach Michael Malone has emphasized the importance of defending the 3-point line on several occasions this season already. Most notably, he lamented that "our inability to defend the 3-point line is a joke," after the team lost to the Phoenix Suns, allowing the Suns to make 15 3-pointers on 55.