PV Sindhu sails into semis at National Badminton Championship 0 2 14 Feb 2019 17:20 Timesofindia.indiatimes.com (sports) Olympic silver medallist PV Sindhu sailed into the last four stage, while Nagpur's Vaishnavi Bhale and Ashmita Chaliha of Assam showed superb resilience to book their maiden semis spots on a dramatic day at National Badminton Championship.