Sun had no issues making it through her last-32 match with an 11-8, 11-5, 11-5 victory over compatriot Kuai Man, setting up a tie with team-mate Liu Shiwen who won 11-7, 11-7, 13-11 against Germany's Xiaona Shan.

Quarter-finals opponents could come from either Japan's Hina Hayata or Hong Kong's Lee Ho Ching, who both picked up victories today.

World number six Hayata won in straight games 11-4, 11-2, 11-4 over Singapore's Goi Rui Xuan while Lee came from a game down to defeat Suh Hyo-won of South Korea 8-11, 11-6, 11-8, 11-4.

Fourth in the world Wang Manyu of China ran out an easy winner by an 11-6, 11-4, 11-6 score line against Georgina Pota of Hungary and now takes on Puerto Rico's Adriana Diaz in the next round who defeated Jieni Shao of Portugal 11-6, 11-7, 8-11, 11-7.

Thailand's Suthasini Sawettabut won in five games to make it through too, beating Slovakia's Barbora Balazova 8-11, 11-3, 8-11, 12-10, 11-2.

Her next opponent is Austrian Sofia Polcanova who defeated Hong Kong's Doo Hoi Kem 4-11, 11-9, 12-10, 11-6.

Men's world number two Ma Long from China progressed despite dropping a set to Nigerian world 11 Quadri Aruna, winning 11-4, 5-11, 11-6, 11-9, and now takes on world number 13 Wang Chuqin who won 11-8, 11-8, 11-5 over England's Liam Pitchford.

Slovenian world number 12 Darko Jorgic won a dramatic match with China's Lin Shidong 10-12, 11-6, 7-11, 11-7, 12-10, setting up a showdown with Chinese Taipei world number seven Lin Yun-Ju who won 11-6, 11-6, 11-7.

Kristian Karlsson went to the limit with Portugal's Joao Geraldo, beating him 12-14, 12-10, 11-9, 12-10.

He takes on German Benedikt Duda who defeated Karlsson's compatriot Truls Moregard 8-11, 11-3, 11-9, 9-11, 11-7.

Liang Jingkun of China defeated Austrian Robert Gardos 12-10, 4-11, 11-6, 11-5 and next faces Kirill Gerassimenko of Kazakhstan, who won 15-13, 11-7, 7-11, 11-9 against Tomislav Pucar of Croatia.