novak djokovic beat andy murray 7-6 4-6 6-0 in florida on sunday .
djokovic won the first set tie-break 7-3 after each player broke serve twice .
murray claimed the second set 6-4 , breaking djokovic with the final game .
the serbian raced away in the final set to claim his fifth miami open title .
murray rises to world no 3 for making the final in key biscayne , florida .
serena williams beat carla suarez navarro 6-2 6-0 in the women 's final .