Satwik and Ashwini, who reached the semifinals of the Toyota Thailand Open Super 1000 event in January, notched up an upset 18-21 10-21 win over the world no 8 pair last night.
The world no.19 duo had earlier defeated the Indonesian combination at the Yonex Thailand Open in a thrilling three-game match in January.
Satwik and Ashwini, who has been training under new foreign coach Mathias Boe for the last one month, will face another Indonesian pair -- Rinov Rivaldy and Pitha Haningtyas Mentari -- next.
Another Indian shuttler, Pranaav Jerry Chopra, who was returning to action after the COVID-19 break, didn't have a good outing as he along with his mixed doubles partner N Sikki Reddy lost 18-21 15-21 to the third-seeded English pair of Marcus Ellis and Lauren Smith in 39 minutes.
Top Indian players, including world champion P V Sindhu, will start their campaign later in the day.
Swiss Open is the first event in the extended Olympic qualification period which will end on June