For Monday's semi, Indonesia will play Singapore, which earned its spot after defeating host nation the Philippines 3-2. 

Sunday's best-of-five victory was achieved thanks to wins from Gregoria Mariska Tunjung and Ruselli Hartawan in singles as well as Ni Ketut Mahadewi Istarani and Apriyani Rahayu in doubles. Singles shuttler Fitriani lost her match, while the fifth match was not played. 

Women's singles coach Rionny Mainaky said the Indonesian team would likely rely on its singles shuttlers in its battle with Singapore.

“The challenge [on court] has been quite usual, with the players having to deal with drift. Each side of the court has different drift characteristics. So, when a player feels comfortable with the drift on one side of the court, they can be thrown out when they switch sides.

“Our shuttlers need to be ready for this challenge, so when they face tougher opponents it won't be a problem for them anymore,” said Riony in a statement on Sunday.

He added that Indonesia’s shuttlers had made a good start but would need to remained focused throughout the tournament.

On paper, Riony said, his team was stronger than Singapore. Nevertheless, he reminded the shuttlers to avoid blunders.

Meanwhile, Ruselli, whose 21-15, 21-10 win over Tran Thi Phuong Thuy clinched Indonesia’s spot in the semis, said she was happy to play her role.

“I’m grateful that I contributed the winning point. This is my first SEA Games. I feel really happy about it,” said the 21-year-old.

She added that she had learned from her match against Vietnam.

“The biggest challenge was the drift, which was quite strong. But I’ve studied the drift now, so hopefully I can do even better tomorrow [Monday],” she added.