Berdasarkan hasil babak 16 besar, akan terjadi perang saudara ganda putra Indonesia di perempat final Hylo Open 2021.
Berikut ini jadwal perempat final Hylo Open 2021:
Court 1:
Match 3 (Estimasi 19.30 WIB)
Mark Lamsfuss/Isabel Lohau (Jerman) vs Praveen Jordan/Melati Daeva Oktavianti
Match 4 (Estimasi 20.15 WIB)
Marcus Fernaldi Gideon/Kevin Sanjaya Sukamuljo vs Daniel Lundgaard/Mathias Thyrri (Denmark)
Match 7 (Estimasi 22.30 WIB)
Dechapol Puavaranukroh/Sapsiree Taerattanachai (Thailand) vs Hafiz Faizal/Gloria Emanuelle Widjaja
Match 10 (Estimasi 00.45 WIB)
Rinov Rivaldy/Pitha Haningtyas Mentari vs Niclas Nohr/Amalie Magelund
Court 2:
Match 1 (Estimasi 18.10 WIB)
Pramudya Kusumawardana/Yeremia Erich Yoche Yacob Rambitan vs Fajar Alfian/Muhammad Ardianto
Match 2 (Estimasi 18.55 WIB)
Puttita Supajirakul/Sapsiree Taerattanachai (Thailand) vs Siti Fadia Silva Ramadhanti/Ribka Sugiarto