Spaniard Marin, seeded fourth for the tournament at the Indoor Stadium, comfortably swept aside Chia Hsin Lee of Chinese Taipei with a 21-7, 21-11 win in just 27 minutes.

The victory for the 23-year-old set up a rematch of the Rio 2016 final against PV Sindhu as the Indian player progressed by overcoming Indonesia's Fitriani Fitriani 19-21, 21-17, 21-8.

Tai joined the Olympic gold medallist in the last eight by beating team-mate Chiang Mei Hui 21-11, 21-8.

Unseeded Japanese Sayaka Sato, conqueror of Thailand's defending champion Ratchanok Intanon in round one, awaits for Tai in the quarter-finals after she ousted Kim Hyo-min of South Korea 21-16, 21-10.

Second seed Sung Ji-hyun is also through thanks to a 21-11, 21-16 success against Pai Yu Po of Chinese Taipei.

Sun Yu of China, seeded sixth, will play the South Korean for a place in the semi-finals as she battled to a hard-fought 19-21, 21-13, 21-14 win over team-mate Chen Yufei.

China's Shi Yuqi is the highest-seeded player still in contention for the men's Singapore Super Series crown as he reached the last eight with a straight-games victory in his clash with Spaniard Pablo Abian.

Shi, gold medallist at the 2014 Summer Youth Olympic Games in Nanjing, made light work of Abian as he cruised to a 21-10, 21-16 success.

India's Srikanth Kidambi is due to meet Shi in the last eight tomorrow as he overcame Indonesia's Ihsan Maulana Mustofa in three games, 18-21, 21-19, 22-20.

Elsewhere in the men's draw, eighth seed Tanongsak Saensomboonsuk of Thailand will entertain Indian Sai Praneeth Bhamidipati in the quarter-finals.

Saensomboonsuk accounted for Hu Yun of Hong Kong with a 21-17, 23-21 victory, while Praneeth proved too strong for Qiao Bin of China, emerging on the right side of a 21-15, 21-23, 21-16 scoreline.