Knudsen fought back from two games down to triumph 7-11, 9-11, 12-10, 11-6, 11-9 at the expense of Zaman Jnr, who was expected to reach the last-16 stage at the very least.

The 17-year-old from Bogotá will now face further Pakistan opposition, Abbas Zeb, in the third round.

Zeb defeated India’s Veer Chotrani 11-8, 11-7, 11-5 today.

Egypt’s Youssef Ibrahim, the men’s top seed, eased into the third round after defeating Canada’s Salaheldin Eltorgman 11-2, 11-6, 11-3.

Second seed Mohammad Al Sarraj, who is bidding to become the first player from Jordan to win a world title, beat home hope Mitchell Kempton 5-11, 11-4, 11-7, 11-3.

Both of the top seeds had received byes in round one.

Kaitlyn Watts, the highest-ranked New Zealander in the women's draw, delighted home supporters with an 11-4, 11-2, 11-6 victory over Australia’s Courtney Mather in just 18 minutes.

The 16-year-old from Palmerston North next goes up against Malaysian Chan Yiwen, who overcame South Africa’s Danielle Shone 11-5, 11-5, 11-2.

Top seed Hania El Hammamy of Egypt beat India’s Ashita Bhengra 11-2, 11-1, 11-3, while second-seeded compatriot Zeina Mickawy defeated the United States’ Elisabeth Ross 9-11, 11-7, 11-4, 11-7.

A total of 64 players will line up in the third round of the men's and women’s competitions tomorrow.