Rhustavito made it through to the quarter-finals after beating Germany's Max Weisskirchen 21-15, 21-17, and was joined by French second seed Popov after his 21-10, 21-12 victory over Malaysian Ng Tze Yong.

Malaysian Cheam June Wei is through after a 14-21, 21-15, 21-16 win over Sweden's eighth seed Felix Burestedt, while Israel's third seed Misha Zilberman came from a game down to beat France's Lucas Claerbout 16-21, 21-13, 21-18.

South Korea's Lee Dong-keun thrashed Spanish fifth seed Pablo Abian 21-6, 21-19, while Brazil's sixth seed Ygor Coelho won 25-23, 21-14 against Denmark's Victor Svendsen.

Denmark's third seed Line Christophersen is through in the women's singles following a 21-1, 21-10 win over Spain's Clara Azurmendi; but her compatriot and sixth seed Julie Dawall Jakobsen was knocked out by Spain's Beatriz Corrales by a score of 18-21, 21-19, 21-13.

Also through is Belgian fourth seed Lianne Tan following a 21-7, 23-25, 21-13 win over France's Yaelle Hoyaux, and Indonesian Putri Kusuma Wardani, who defeated fifth seed compatriot Ruselli Hartawan 21-14, 16-21, 21-15.

France's Leonice Huet then knocked out Estonian eighth seed Kristin Kuuba in three games 21-19, 9-21, 21-18.

In the men's doubles, Danish top seeds Kim Astrup and Anders Skaarup Rasmussen are through to the quarter-finals following a 21-10, 21-10 victory over France's Samy Corvee and Kenji Lovang.

Fifth seeds Pramudya Kusumawardana and Yeremia Erich Yoche Yacob Rambitan of Indonesia are also through after winning 21-15, 21-13 against French pair Lucas Corvee and Ronan Labar.

Their compatriots second seeds Leo Rolly Carnando and Daniel Marthin defeated France's Fabien Delrue and William Villeger 21-18, 21-17, and unseeded Indonesians Sabar Karyaman Gutama and Moh Reza Pahlevi Isfahani are through following a 22-20, 21-15 win over Dutch eighth seeds Ruben Jille and Ties van der Lecq.

Indonesian third seeds Muhammad Shohibul Fikri and Bagas Maulana defeated England's Matthew Clare and Ethan van Leeuwen 21-13, 21-16.

In the women's doubles, Scottish seventh seeds Julie MacPherson and Ciara Torrance won their last 16 game against France's Laeticia Jaffrennou and Tea Margueritte 21-12, 21-5.

Top seeds Amalie Magelund and Freja Ravn of Denmark defeated Clara Azurmendi and Beatriz Corrales of Spain 21-13, 19-21, 21-14, and Indonesian sixth seeds Nita Violina Marwah and Putri Syaikah won in straight games 23-21, 21-14 against Sweden's Clara Nistad and Johanna Magnusson.

Estonian third seeds Kati-Kreet Marran and Helina Ruutel were defeated by England's Jessica Hopton and Jessica Pugh 21-9, 12-21, 21-12.

Danish fourth seeds Julie Finne-Ipsen and Mai Surrow won 21-13, 21-8 against England's Grace King and Lizzie Tolman, and Malaysian fifth seeds Anna Ching Yik Cheong and Yap Cheng Wen came from a game down to beat Germany's Annabella Jäger and Stine Küspert 19-21, 21-6, 21-17.