How long until Andy Murray takes away Novak Djokovic's 3rd place ranking and pushes him down to 4th?

Murray needs to win the olympics, the us open and every master series event until the end of the year (madrid and paris) also if djokovic gets third place or less at the olympics and loses in the first round of the us open and in the first rounds of the master series (madrid and paris) then murray wud be number 3