NBA Round-up: Jayson Tatum hits triple-double as Boston Celtics thrash Luka Doncic's Dallas Mavericks

NBA Round-up: Jayson Tatum hits triple-double as Celtics thrash Luka Doncic's Mavericks; Jamal Murray sparked Denver to win over Clippers; Lauri Markkanen scored career-high 49 to lead Jazz to win over Rockets; Ja Morant scored 32, Jaren Jackson Jr. added 31 as Grizzlies beat Magic