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 Australian Open badminton tournament in Sydney 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. Manjunath faces the winner of the match between Lee Zii Jia and Leong Jun Hao -- both Malaysians -- in the second round of the BWF Super 500 tournament.