NBA champions Oklahoma City Thunder powered to their 14th straight victory, beating the Dallas Mavericks 132-111 to push their record to an impressive 22 wins and one loss.NBA Most Valuable Player Shai Gilgeous-Alexander scored 33 points and Jalen Williams and Chet Holmgren added 15 apiece in Friday’s game for Oklahoma City, who are off to the best start to a season since the Golden State Warriors opened the 2015-16 campaign 24-0.Up by 30 through three quarters, the Thunder rested their starters in the final period, the Mavericks’ three-game winning streak ending with a thud.Jaden Hardy scored 23 points off the bench to lead the Mavs on a night when star centre Anthony Davis scored just two points, making his lone basket of the night in an irrelevant four minutes on court in the final frame.The oft-injured Davis had checked out of the contest in the third quarter after appearing to injure his left knee, sitting on the bench with it wrapped before returning to the game.The Boston Celtics, led by 30 points from Jaylen Brown, cruised past the short-handed Los Angeles Lakers 126-105.The marquee clash lost much of its lustre, with Lakers superstar LeBron James sidelined by the sciatica that caused him to miss the first 14 games of his …