Nour El Sherbini is through to the semi-finals of the World Squash Championships ©PSA World Tour

Defending world champion Nour El Sherbini of Egypt beat Sarah-Jane Perry of England 3-1 to reach the semi-finals of the World Squash Championships in Cairo.

The world number two cliched the first game 11-5 before Perry levelled with an 11-8 win.

However, El Sherbini rediscovered her mojo and the lead with a 11-7 win in the third game.

Perry once again clawed her way back in the fourth game before El Sherbini sealed victory with a hard-fought 14-12 win.

"I’m really happy I’m through," said after her win.

"SJ is one of the smartest, if not the smartest, players on tour.

"She’s very skilful and she was moving really well today.

"She broke my rhythm a little and I just tried to fight and stick in every point. I’m really happy to sneak the last game."

In the other women’s game, Nour El Tayeb of Egypt produced arguably her finest performance since returning to the tour to down world number three and compatriot Hania El Hammamy 3-1.

Among men, Egyptian Ali Farag sealed a semi-final spot by beating compatriot Marwan ElShorbagy 3-0.

ElShorbagy, who won the previous four matches against Farag, could not replicate his head-to-head form in recent matches.

While ElShorbagy started well, Farag took the first game 11-7 before getting the second game 11-5.

Signs of comeback in the third game from ElShorbagy was quickly snuffed as Farag sealed the deal with a 11-7 win.

"I couldn’t have asked for a better setup to produce my best squash," Farag said.

"CIB are taking the sport to another level that makes us feel very proud to be on court.

"I’ve got every single member of my support team, from the age of zero to 30 here with me.

"Everyone who’s here, I can’t be more inspired, I guess.

"And I hope I can keep up this brand of squash!"

In the other men’s game, Egyptian Mostafa Asal got the better of Peru’s Diego Elías 3-1.

The semi-final matches are scheduled to be held tomorrow.