The Lakers held off the Heat in the fourth quarter of a 102-96 win in Game Four in Orlando.
LeBron James piled up 28 points, 12 rebounds and eight assists for L.A., which now takes a commanding 3-1 series lead.
Anthony Davis scored 22 points and Kentavious Caldwell-Pope nailed two key buckets late and finished with 15.
The Lakers can lock up a championship with a win in Game Five on Friday.
Jimmy Butler scored 22 for Miami and fell an assist shy of a triple-double.
Tyler Herro added 21 for the Heat in defeat.
(Photo by Kevin C. Cox/Getty Images)