Luka: Mavs must improve 3-point defense to beat Celtics
Luka Doncic focuses on the Mavericks' perimeter defense after the Celtics set an NBA Finals record with seven players recording multiple 3-point field goals.
Luka Doncic focuses on the Mavericks' perimeter defense after the Celtics set an NBA Finals record with seven players recording multiple 3-point field goals.
