Tatum leads Celtics over Heat, Clippers thrash Mavs in NBA playoff openers

Jayson Tatum posted his first playoff triple-double to propel Boston to an NBA playoff series opening victory over Miami on Sunday as the Los Angeles Clippers thrashed the Dallas Mavericks.In Los Angeles, the Clippers also led from start to finish, shrugging off the injury absence of Kawhi Leonard in a 109-97 victory over the Mavs -- who put up just eight points in a shocking second quarter performance.