FILE - In this Nov. 6, 2018, file photo, Dallas Mavericks forward Luka Doncic (77) reacts after making a three-point shot during the first half of an NBA basketball game against the Washington Wizards, in Dallas. The step-back 3-pointer is the perfect weapon for the modern NBA, practically a necessity in a game where the ability to find space to shoot from behind the arc is more valued than ever before. Doncic has ridden it to stardom on both sides of the Atlantic.(AP Photo/Brandon Wade, File)