Danish third seed Peter Gade [ Images ] started with an easy win but Chinese 11th seed Bao Chunlai [ Images ] was upstaged in the first round of the world badminton championships which began under tight security on Monday.

Malaysian world number one Lee Chong Wei [ Images ] and Chinese Olympic [ Images ] champion Lin Dan [ Images ], chasing a record hattrick of titles, were due to open their campaign later on the opening day.

Former All-England champion Gade displayed power and precision to dispatch unseeded Valeriy Atrashchenkov of Ukraine 21-11, 21-16 in 29 minutes.

Unseeded Dutchman Dicky Palyama [ Images ] caused the first upset on an adjacent court, edging Bao 21-18, 21-14 in just over 30 minutes.

England [ Images ] pulled out of the championships on Sunday citing a "specific terrorist threat", following media reports of a threat to the event by the Pakistan-based Lashkar-e-Taiba.

The militant group has been blamed for the raid on Mumbai [ Images ] in November in which 166 people were killed.