Jakarta | Positive result shown by Greysia Polii/Apriyani Rahahayu when they beat the World’s No. 1 player from Japan, Mayu Matsumoto/Wakana Nagahara during the Australian Open 2019 BWF World Tour Super 300, last July, has caused Eng Hian, the head coach for Women’s Doubles team of PBSI, to hope that the pair can maintain this momentum to compete in Blibli Indonesia Open 2019 BWF World Tour Super 1000 that will be held in Istora Senayan, Jakarta from 16 to 21 July 2019.