Shanghai Masters champion Novak Djokovic said he still has unfinished business this season after delivering the perfect response to being knocked off the men's top ranking.

The soon-to-be-married Serb ceded the world No 1 spot to Rafael Nadal, but his reaction has been emphatic with an unbeaten run in China adding two titles to his collection.

Immediately after Nadal returned to No 1 by reaching the China Open final, Djokovic proved he was not about to go away by defending his title from the Spaniard in straight sets.