The Sobhy sisters carry home hopes in the World Championship second round on Friday.
Amanda, the fifth seed in Chicago, plays Hollie Naughton of Canada as some action moves to the atmospheric Union Station. No.16 seed Sabrina, meanwhile, takes on Egyptian Hana Ramadan.
There are several eye-catching all-Egyptian last 32 encounters elsewhere. Men’s top seed Mostafa Asal plays Omar Mosaad, while Fares Dessouky comes up against Mohamed Abouelghar for a place in the third round.
World No.2 Nour El Sherbini was amongst the winners on day two as the Egyptian kickstarted her attempts to win a seventh world title with victory over World No.38 Hana Moataz at the University Club of Chicago.
“I’ve never even seen Hana play before, so I didn’t know what to expect,” said El Sherbini, who will overtake Nouran Gohar as World No.1 on Monday.
“I’m pleased to be going back to No.1, but it’s still a long week and a very important one for me. I just want to take it day-by-day without thinking about it that much. But of course I’m happy to be back to No.1 and hopefully I can keep this spot.”
In the men’s draw, World No.1 Diego Elias began his efforts to become the first South American world champion with an 11-9, 11-7, 11-4 win against Germany’s Raphael Kandra.
The longest match of the day – at 65 minutes – saw Hong Kong’s Henry Leung hold off a spirited fightback from English stalwart James Willstrop.
Leung was 2-0 up before Willstrop mounted a superb fightback to level the match. The Hong Konger clinched an entertaining fifth 15-13.
Leung said: “I didn’t think too much, I just put effort into every rally and made every rally as hard as possible.”
Willstrop’s close friend Saurav Ghosal did come away the right side after overturning a 2-1 deficit to edge Yahya Elnawasany 3-2. He now plays Leung.
The Indian said: “It’s the World Championships, it’s in Chicago which is a great city and we are happy to be here. I have fond memories and the people are brilliant. I find it satisfying playing at the University Club of Chicago and Union Station.”
World No.2 Mohamed ElShorbagy will play a familiar pro in Eain Yow Ng, of Malaysia, the pair having trained in Bristol together for several years.
ElShorbagy cruised into the second round after downing Timothy Brownell, who was on his home court.
The England No.1 said: “I’m playing Yow now and we know each other very well, we’ve trained together in Bristol for many years now and have played so many times. He’s been a lot more consistent this season and he’s taken out Paul [Coll] in Singapore and Victor [Crouin] at Optasia.
“No one knows me on tour better apart from my brother.”