The powerful 26-year-old from Cairo recovered from a two games to nil deficit to win 7-11, 9-11, 11-8, 12-10, 12-10, 11-7 and earn a meeting with China’s seventh seed Yan An, who beat Austria’s Stefan Fegerl in six games.

China’s third seed Fang Bo, winner of this title in 2013, had to come from 3-1 down to defeat Hong Kong’s rising power Ng Pak Nam in seven games.

He will now meet Japan’s defending champion Kenta Matsudaira, the sixth seed, who defeated France’s Emmanuel Lebesson 8-11, 11-9, 6-11, 11-5, 11-9, 11-5.

France’s Simon Gauzy beat Masaki Yoshida of Japan in five games to earn his quarter-final against Brazil’s Hugo Calderano, victor over Germany’s Bastian Stieger.

The last two quarter-final opponents did it the hard way, coming through seven-game matches, with China’s Gaoyuan Lin defeating home player Robert Gardos, and Japan’s Koki Niwa coming through against Ruwen Filus of Germany.

Both the quarter-final and semi-final matches in the men’s and women’s singles will be played tomorrow.

Hong Kong’s Doo Hoi Kem was the only non-Chinese player in the top half of the draw to earn a quarter-final place in the women’s singles with a four-games win over Japan’s Kyoka Kato.

Doo Hoi Kem’s next match is against fourth seed Sun Yingsha, who needed the full seven games to end the hopes of her Chinese colleague Chen Xingtong 3-11, 15-13, 13-15, 13-11, 9-11, 11-6, 11-7.

Chen Meng, the top seed, overcame Hong Kong’s Lee Ho Ching11-7, 11-6, 11-9, 12-14, 11-3, and now meets Wang Manyu, the sixth seed, who ended the hopes of compatriot Chen Ke in six games.

The bottom half of the draw saw the same balance of power as Japan’s 17-year-old Hina Hayata joined three Chinese players in going through.

Hayata beat Luxembourg’s 54-year-old qualifier Ni Xialin – a world champion in Tokyo in 1983, 17 years before her opponent was born – in six games to earn a meeting with Gu Yuting, who beat Japan’s Yui Hamamoto.

Zhang Rui, who beat compatriot Wang Yidi in six games, now meets Guo Ruochen, who beat Portugal’s Fu Yu.

Germany’s Ruwen Filus and Ricardo Walther, both right-handers, earned a surprise win over China’s Fang Bo and Zhou Yu - by 3-11, 11-8, 9-11, 11-9, 11-9 – to reach Sunday’s men’s doubles final, where they will meet Japan’s Koki Niwa and Jin Ueda, the third seeds who beat Hong Kong’s Ho Kwan Kit and Wong Chun Ting 12-10, 12-11, 11-9.

Sunday’s women’s doubles final will be between Japan’s top seeds Honoka Hashimoto and Hitomi Sato, who beat the combination of Austria’s Sofia Polcanova and China’s Wang Yidi 11-9, 11-7, 11-4, and China’s Chen Xingtong and Sun Yingsha,  who beat Miyu Kato and Miyu Nagasaki from Japan 11-6, 11-8, 11-6.