Unheralded Indian Mithun Manjunath stunned fourth seed and world number seven Kean Yew Loh of Singapore in the opening round while PV Sindhu and Kidambi Srikanth secured straight-game wins at the Australia Open badminton tournament here on Wednesday.

Manjunath, ranked 50th in the world, beat Loh 21-19 21-19 in the men’s singles first round match that lasted 41 minutes.