China's Lin Dan, Chen Long reach second round at badminton worlds

Lin, who won his first world title in 2006, said he changed his tactics and those adjustment proved successful.

"Actually I always know that he is one of the best players in the world so I made full preparation for this match."

Competing in his 12th World Championships, Lin will on Tuesday morning take on H.S. Prannoy of India.

The third-seeded Chen, who won the world title in 2014 and 2015, fought off a hard challenge from Malkov in the second set, in which he trailed 12-14, but managed to regain the momentum for a 21-14, 21-17 victory in 58 minutes.