LeBron James called for improvement after the Los Angeles Lakers saw their winning streak abruptly halted by the Dallas Mavericks. Riding a 10-game winning run, the NBA-leading Lakers went down 114-100 to the Mavericks in Los Angeles on Sunday. Despite Anthony Davis' double-double (27 points, 10 rebounds) and James' 25 points, the Lakers (17-3) fell to their third defeat of the season.