Defensive Foul, Offensive player stays on path, illegal contact by the defender

“This is an example of where a dribbler does not veer off his path into a defender. The offensive player, Luka Doncic, drives toward the basket and he does not veer off his path in any way. The trailing defender, Keldon Johnson, moves into Doncic’s path without establishing legal guarding position, and Johnson makes more than marginal contact with Doncic. This is a defensive foul. To get into a legal guarding position, the defender needs to establish himself in the path of the offensive player before contact is made.”