Dallas' new deep threat and Boston's new defensive groove: Keys to pivotal Game 4s

After a pair of pivotal Game 4s took place in the conference semifinals Sunday, two more are on deck Monday night. On Saturday, the Boston Celtics took control of their series with the Cleveland Cavaliers behind a pair of big performances from stars Jayson Tatum and Jaylen Brown, earning a 106-93 victory to bounce back from a Game 2 loss. The Dallas Mavericks got a second straight lift from P.J. Washington, who scored 27 points and hit five 3-pointers to power Dallas to a 2-1 lead against the Oklahoma City Thunder.