Elshorbagy, the world number one and top seed, dispatched Hong Kong's Leo Au in straight games 11-7, 11-3, 11-6 at Union Station to progress to the last eight for the third consecutive World Championships.

The Egyptian will take on sixth seed Miguel Rodriguez of Colombia, who battled to a 12-14, 11-2, 7-11, 11-9, 11-8 victory over England's James Willstrop in a feisty last 16 encounter.

Mohamed's younger brother Marwan Elshorbagy is also through after he beat Australia's Ryan Cuskelly 11-4, 11-7, 9-11, 11-7.

Egypt's Tarek Momen, a 5-11, 11-4, 8-11, 13-11, 11-3 winner in his contest with team-mate Mohamed Abouelghar, awaits for Elshorbagy in the quarter-finals.

In the women's draw, El Welily, the top seed and pre-event favourite, cruised to an 11-8, 11-6, 11-7 victory against England's Alison Waters.

Nouran Gohar will face her fellow Egyptian in the last eight after she ousted Victoria Lust of England 11-8, 11-8, 11-9.

World number 12 Annie Au became the first player from Hong Kong to qualify for the quarter-finals at the World Championships as she ended 2013 champion Laura Massaro's challenge with a comfortable 11-9, 11-8, 11-4 win.

Au will go up against Egyptian Nour El Tayeb in the last eight after she recorded a 11-7, 11-3, 11-6 success over French surprise package Melissa Alves.

"I'm feeling really good after today’s performance," said Au.

"Laura is a really experienced and determined player, so I needed to stay concentrated throughout the whole match. 

"If I lost my concentration, then I knew that she would fight back and give me a hard time."

The tournament in Chicago continues tomorrow.