Abu Dhabi: Novak Djokovic says the main source of his motivation at this stage of his career is securing a lasting legacy rather than simply trying to win tennis matches and trophies.

For nearly two years, from mid-2016 until mid-2018, the Serb had admittedly struggled with motivation after pulling off the historic feat of winning four Grand Slams in a row—a first in men's tennis since 1969.