PV Sindhu's demolition of Japan's Nozomi Okuhara in the World Championship final was "perfect execution" of a strategy which included putting a halt to the Indian ace's tendency to be repetitive, says the country's foreign badminton coach Kim Ji Hyun. Kim, a former South Korea international and coach, sat by the courtside as Sindhu thrashed 2017 champion Okuhara 21-7 21-7 in one of the most lop-sided finals in the history of the tournament to lift her maiden World Championshi