Young Indian doubles pair of Satwiksairaj Rankireddy and Chirag Shetty, ranked 32nd later stunned World No 6 Danish combo of Mads Conrad-Petersen and Mads Pieler Kolding to reach their second quarterfinal of the season.
Olympic silver medallist Sindhu dumped Japan's Sayaka Takahashi 21-14 21-13 to set up a revenge match against China's Chen Yufei. The World No 10 Chinese had knocked Sindhu out in the opening round at Denmark Open.
Srikanth, who was crowned the Denmark Open champion last week, saw off Hong Kong's Wong Wing Ki Vincent 21-19 21-17 in a 37-minute match. The Indian had beaten Wong in the semifinals at Denmark Open last week.
In the opening match, the World No 8 had emerged victories after his opponent Fabian Roth of Germany retired at 0-3.
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In men's doubles, Satwiksairaj and Chiragdished out another superb performance as they shocked the 2016 European champions Conrad-Petersen and Kolding 22-20 12-21 21-19 to reach the quarterfinals.
Former World No 1 Saina, however, failed to get across Japans World No 5 Akane Yamaguchi, losing 9-21 21-23 in a 39 -minute clash second round clash. This is her second loss to the fifth seeded Japanese in two weeks. Saina had lost to Yamaguchi in the quarterfinals at Odense.
Ashwini Ponnappa and N Sikki Reddy lost 16-21 14-21 to top seeded Japanese Misaki Matsutomo and Ayaka Takahashi in women's doubles.
In the other women's singles, Yamaguchi, who had finished as runners-up at Odense last week, tore through the opening game, leading from start to finish to earn the bragging rights.
Saina regained her composure in the second, producing a gallant fight as she kept nipping at her opponent's heels, despite being 7-11 down at the break.
The Indian caught up with the Japanese at 19-19 and had also grabbed a game point at 20-19 but Yamaguchi managed to stay ahead.
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