Year-end No 1 ranking now Djokovic's primary target

Serbian determined to bump Nadal from top spot after Paris triumph

PARIS - Novak Djokovic said he is ready for the "big task" of trying to win the ATP Tour Finals in London and claim the year-end world No 1 spot for a record-equaling sixth time.

The 16-time Grand Slam champion sealed his fifth Paris Masters title on Sunday with a 6-3, 6-4 victory over Canadian Denis Shapovalov, but will be usurped by the injured Rafael Nadal at the top of the rankings on Monday.