Star Indian shuttlers HS Prannoy and Lakshya Sen progressed to the men's singles second round of the World Championships with straight-game wins over Finland's Kalle Koljonen and Mauritius' Georges Julien Paul respectively in Copenhagen, Denmark on Monday. Prannoy, the world number 9, who reached the quarterfinals in the last two editions, saw off the left-handed Koljonen 24-22, 21-10 to extend his head-to-head count over the Finnish player to 3-0. Sen, the reigning Commonwealth Games gold medallist, then streamrolled Paul 21-12, 21-7 in 25 minutes to follow Prannoy into the second round.