CNN  —  The NBA playoff picture came into full focus Friday night with the final two games of the play-in tournament. The Miami Heat, who were the last team into the Eastern Conference play-in bracket with the 10th-best record in the regular season, knocked off the Atlanta Hawks with a 123-114 overtime win to become the No. 8 seed in the East. In the Western Conference, it was the Memphis Grizzlies pummeling the Dallas Mavericks 120-106 to take the eighth seed in the West. In the first game of