Japan's Risa Sugimoto scored the only upset on the first day of action in the WSF Women's World Junior Individual Squash Championship in Boston, USA, when she ousted Australian Selena Shaikh, a 9/16 seed, to claim an unexpected place in the third round of the World Squash Federation championship at Harvard University.

Sugimoto became the only Japanese player through to the last 32 after despatching Melbourne-based Shaikh 12-10, 11-4, 11-5 in 27 minutes.

Defending champion Amanda Sobhy led US hopes into the third round after crushing Ecuador's Mikaela Albuja Sanchez 11-3, 11-2, 11-1 in just 13 minutes. The No2 seed from New York will be joined by her younger sister in the next round after Sabrina Sobhy beat South African Alexandra Fuller 11-6, 9-11, 11-6, 11-7.

And fellow New Yorker Olivia Blatchford also comfortably made it through her first match. Seeded to reach the sem-finals, Blatchford defeated India's Lakshya Ragavendran 11-0, 11-4, 11-3.

RESULTS: WSF Women's World Junior Individual Squash Championship, Boston, USA

1st round:
Lakshya Ragavendran (IND) bt Julianne Chu (USA) 11-6, 5-11, 12-10, 5-11, 11-6 (40m)
Fiona Murphy (WAL) bt Jennifer Brown (AUS) 11-2, 1-11, 11-5, 9-11, 11-6 (35m)
Julie Lee (RSA) bt Challen Stowell (AUS) 11-6, 11-9, 11-6 (35m)
Keisha Jeffrey (GUY) bt Nicole Gordillo Bravo (ECU) 11-7, 11-8, 8-11, 11-5 (24m)
Kayla Jeffrey (GUY) bt Laura Lagerweij (NED) 11-8, 11-8, 11-5 (22m)
Alexandra Fuller (RSA) bt Annika Wiese (GER) 11-8, 15-13, 11-7 (28m)
Victoria Temple-Murray (ENG) bt Tessa ter Sluis (NED) 11-2, 11-5, 7-11, 11-8 (27m)
Maria Elena Ubina (USA) bt Marie Stephan (FRA) 11-8, 11-2, 12-10 (21m)
Lume Landman (RSA) bt Abbie Palmer (NZL) 11-8, 11-5, 11-4 (23m)
Nele Gilis (BEL) bt Samantha Ward (ENG) 11-3, 11-6, 5-11, 11-5 (29m)
Chloe Pearson (ENG) bt Abbey Foster (CAN) 11-6, 11-9, 8-11, 11-5 (39m)
Hollie Naughton (CAN) bt Laura Kutsch (GER) 11-2, 11-2, 11-7 (21m)
Jennifer Haley (WAL) bt Nikki van der Heijden (NED) 8-11, 11-2, 9-11, 11-7, 11-9 (49m)
Jessica Turnbull (AUS) bt Mary Fung-A-Fat (GUY) 11-8, 11-8, 11-6 (19m)
Choi Uen Shan (HKG) bt Rebecca Barnett (NZL) 11-4, 11-6, 10-12, 11-6 (37m)

2nd round:
[1] Nour El Tayeb (EGY) bt Alyssa Mehta (CAN) 11-2, 11-5, 11-3 (16m)
Celine Yeap (MAS) bt Elvira Bedjai (FRA) 11-6, 11-5, 11-6 (29m)
[9/16] Anaka Alankamony (IND) bt Olivia Fiechter (USA) 8-11, 11-9, 11-9, 11-9 (41m)
Alix Younger (CAN) bt Katie Smith (ENG) 11-6, 11-7, 9-11, 11-6 (30m)
[5/8] Tamika Saxby (AUS) bt Sophie Lemom (ENG) 11-7, 11-7, 11-6 (22m)
Haley Mendez (USA) bt Mireya Lucia Espinosa Proano (ECU) 11-5, 11-1, 11-3 (16m)
[9/16] Salma Hany (EGY) bt Maria Jose Guarderas (ECU) 11-1, 11-0, 11-1 (12m)
Vanessa Raj (MAS) bt Julia Lecoq (FRA) 8-11, 11-9, 7-11, 11-8, 11-4 (56m)
[3/4] Olivia Blatchford (USA) bt Lakshya Ragavendran (IND) 11-0, 11-4, 11-3 (16m)
Ka-Yi Lee (HKG) bt Fiona Murphy (WAL) 11-4, 13-11, 11-6 (22m)
[9/16] Melissa Alves (FRA) bt Julie Lee (RSA) 11-7, 12-10, 11-4 (21m)
Caroline Sayegh (GER) bt Keisha Jeffrey (GUY) 11-8, 11-4, 8-11, 8-11, 11-3 (43m)
[5/8] Emily Whitlock (ENG) bt Kayla Jeffrey (GUY) 11-2, 11-5, 11-0 (17m)
Sabrina Sobhy (USA) bt Alexandra Fuller (RSA) 11-6, 9-11, 11-6, 11-7 (32m)
[9/16] Megan Craig (NZL) bt Victoria Temple-Murray (ENG) 11-6, 17-15, 4-11, 11-1 (33m)
Maria Elena Ubina (USA) bt Elani Landman (RSA) 11-8, 11-4, 11-6 (20m)
Danielle Letourneau (CAN) bt Lume Landman (RSA) 11-5, 11-1, 12-10 (18m)
[9/16] Tesni Evans (WAL) bt Nele Gilis (BEL) 11-3, 11-7, 11-6 (23m)
Chloe Pearson (ENG) bt Ilona Lagerweij (NED) 6-11, 11-7, 11-2, 11-3 (40m)
[5/8] Nouran El Torky (EGY) bt Hollie Naughton (CAN) 11-8, 11-6, 11-3 (23m)
Sue Ann Yong (MAS) bt Jennifer Haley (WAL) 11-7, 11-5, 11-5 (24m)
[9/16] Ho Ka Po (HKG) bt Jessica Turnbull (AUS) 11-3, 11-6, 11-2 (19m)
Aparajitha Balamurukan (IND) bt Choi Uen Shan (HKG) 11-9, 9-11, 11-4, 11-6 (30m)
[3/4] Nour El Sherbini (EGY) bt Hannah Davies (WAL) 11-2, 11-3, 11-2 (14m)
Mariam Ibrahim Metwally (EGY) bt Ankita Sharma (IND) 11-4, 11-3, 11-4 (23m)
Risa Sugimoto (JPN) bt [9/16] Selena Shaikh (AUS) 12-10, 11-4, 11-5 (27m)
Danielle Fourie (NZL) bt Bethany Brazier (AUS) 11-4, 11-9, 11-8 (21m)
[5/8] Kanzy Emad El-Defrawy (EGY) bt Paulina Perez Gonzalez (MEX) 11-2, 11-2, 11-1 (13m)
Steffi Rosner (GER) bt Ashley Khalil (GUY) 11-4, 11-8, 11-5 (24m)
[9/16] Tan Yan Xin (MAS) bt Michelle Gemmell (CAN) 6-11, 11-3, 11-7, 11-5 (34m)
Ho Tze-Lok (HKG) bt Saumya Karki (IND) 11-13, 9-11, 12-10, 11-9, 11-5 (58m)
[2] Amanda Sobhy (USA) bt Mikaela Albuja Sanchez (ECU) 11-3, 11-2, 11-1 (13m)

3rd round line-up:
[1] Nour El Tayeb (EGY) v Celine Yeap (MAS)
[9/16] Anaka Alankamony (IND) v Alix Younger (CAN)
[5/8] Tamika Saxby (AUS) v Haley Mendez (USA)
[9/16] Salma Hany (EGY) v Vanessa Raj (MAS)
[3/4] Olivia Blatchford (USA) v Ka-Yi Lee (HKG)
[9/16] Melissa Alves (FRA) v Caroline Sayegh (GER)
[5/8] Emily Whitlock (ENG) v Sabrina Sobhy (USA)
[9/16] Megan Craig (NZL) v Maria Elena Ubina (USA)
[9/16] Tesni Evans (WAL) v Danielle Letourneau (CAN)
[5/8] Nouran El Torky (EGY) v Chloe Pearson (ENG)
[9/16] Ho Ka Po (HKG) v Sue Ann Yong (MAS)
[3/4] Nour El Sherbini (EGY) v Aparajitha Balamurukan (IND)
Risa Sugimoto (JPN) v Mariam Ibrahim Metwally (EGY)
[5/8] Kanzy Emad El-Defrawy (EGY) v Danielle Fourie (NZL)
[9/16] Tan Yan Xin (MAS) v Steffi Rosner (GER)
[2] Amanda Sobhy (USA) v Ho Tze-Lok (HKG)

Official website: www.worldsquash.org/worldjuniors2011