China player collapses twice in deciding game before ousting home favourite PV Sindhu to reach quarter-finals at the event for first time.

Third-seeded Wang Zhi Yi pushed the Indian superstar to her absolute limits in a gruelling, roller-coaster contest that kept the arena on edge.

China's world number three Wang Zhi Yi overcame severe cramps to down Indian star P.V. Sindhu and reach the quarter-finals of the badminton world championships on Thursday.