– Novak Djokovic admits that Andy Murray’s dramatic last-gasp assault on his world number one ranking has rejuvenated a season which was limping into mediocrity for the 12-time major winner. Djokovic has suffered a worrying dip in form since winning his first French Open and completing the career Grand Slam in June. But as the 29-year-old prepares to defend the Paris Masters title he has won for the past three years, he insists Murray’s charge for the top has provided the fresh impetus he needs. …