• Djokovic into last eight with 6-4, 6-7, 6-2, 6-3 win • Nishikori beats Carreño Busta, Raonic defeats Zverev If the guard is changing at the summit of tennis, it is doing so slowly and without conviction, as Novak Djokovic steps into the void left by the departure of Roger Federer. After eight days of the fortnight, the world No 1 is again instilling fear into his side of the draw, as he lurks – fit, seasoned and determined – three matches away from a record seventh Australian Open title. Melbourne (and maybe the tournament) was said to belong to the 20-year-old Greek force of nature, Stefanos Tsitsipas, after he put 37-year-old Federer out of the tournament the previous day, and Daniil Medvedev, a mere 22, would, according to many good judges, give 31-year-old Djokovic plenty to think about in the fourth round. Continue reading...