Andy Murray is aiming to stay at the top of the world rankings for a long time after confirming his dominance of world tennis by beating Novak Djokovic on Sunday. The 29-year-old Scot brushed aside the Serb, who he usurped as the world number one earlier in the month, 6-3 6-4 in the final of the ATP World Tour Finals in London.
Murray keen to remain top do
