It had looked like El Sherbini was in cruise control as she took the first two games 12-10, 13-11, putting her within one game of a place in the semi-finals.

Seventh seed El Tayeb, however, produced an extraordinary comeback to win the next three games 11-9, 11-9, 11-7 to secure her place in the last four.

"Nour [El Sherbini] is an unbelievable player and we have had a lot of battles this season," El Tayeb said after her victory.

"My coach and husband [men's player Ali Farag] told me to dig in and told me not to worry about the first two games because I was playing well.

"Being 2-0 down against Nour El Sherbini is probably the hardest thing in the world on a squash court but I just thought I am playing so well and so I just let loose but it was close all the way."

El Tayeb will now face England's Sarah-Jane Perry in the semi-finals after she came from a game down to beat third seed Camille Seme of France 10-12, 11-6, 11-5, 11-5.

The other semi-final will feature New Zealand's Joelle King and Egypt's Raneem El Welily, after they recorded victories against Amanda Sobhy of the United States and England's Alison Waters, respectively.

In the men's draw, El Tayeb's husband Farag also made it through to the semi-finals thanks to a comfortable 11-9, 11-1, 15-13 win over unseeded Australian Cameron Pilley.

"We [Farag and El Tayeb] couldn't have asked for a better day," Farag said after booking his semi-final spot.

"Both of us won our matches and hopefully the tournament is not over for either of us, but we have very tough competitors tomorrow.

"The tour is very deep now, and everyone is playing so well but we hope to keep going forward."

Farag will now face fellow Egyptian Marwan Elshorbagy, who beat Germany's Simon Rösner 11-7, 11-4, 11-8.

El Tayeb and Farag, however, are not the only Egyptian husband and wife pair through to the last four after El Welily's husband Tarek Momen secured his spot in the semi-finals with a 16-14, 11-8, 11-3 win over number three seed Karim Abdel Gawad.

After his win over his team-mate, Momen said: "Raneem and I just try to enjoy ourselves on court - everyone is focused on their task and we are both trying to reach as far as possible in this tournament.

"We just try to support each other the best way we can."

Momen will now take on number one seed Mohamed Elshorbagy for a place in the final after he beat unseeded Colombian Miguel Angel Rodriguez 11-7, 14-12, 11-4.