What is happening to Novak Djokovic?

He was beaten two in arow by Tsonga (final in Bangkok Open and 3rd round at BNP Paris Master Series). Do u think he can maintain his consistency or he's on a slump. Is there a chance for Murray to take the number 3 rankings from Djoko next year? Novak is the defending champion at the Australian Open while Murray losses on his first round match. The way Djoko is playing - he's in danger in losing his number 3 ranking to Murray. DoDo you agree?