The first aggressive double-team the Dallas Mavericks put on Al Jefferson came with about four and a half minutes remaining in the fourth quarter. Given Jefferson's stat line (31 points on 15-of-18 shooting) it probably should have come sooner.
Jefferson had arguably his best game since the 2013-14 season, and it came against a team that he only scored 14 points against in two games last season. It helps when Zaza Pachulia defended him for most of the night, but it showed that he is still capable of putting in dominating performances, particularly against weaker post defenders.