Singapore Open champion B Sai Praneeth opened his campaign at the World Championships with a straight-game win over Hong Kong's Wei Nan to reach the second round of men's singles event at Glasgow in Scotland today. The 25-year-old from Hyderabad will next take on Indonesia's Anthony Sinisuka Ginting.India's top mixed doubles pair of Pranaav Jerry Chopra and N Sikki Reddy, seeded 15th, defeated Indo-Malaysian combo of Prajakta Sawant and Yogendran Khrishnan 21-12 21-19.However, disappointment was at store for India in the other mixed doubles matches as B Sumeeth Reddy and Ashwini Ponnappa, and Satwiksairaj Rankireddy and Maneesha K suffered contrasting losses to bow out of the event.In women's singles, National champion Rituparna Das also emerged victorious in the opening round yesterday after heropponent Finland's Airi Mikkela retired after lagging 0-2 in the first game.Saina Nehwal and P V Sindhu will open their campaign today, having got byes in the first round. Ajay Jayaram is also among the Indian shuttlers who will play for next rounds today. Kidambi Srikanth and Sameer Verma already advanced to the second round of the men's singles competition after their relatively easy victories on the opening day yesterday.