Spaniard Torres had beaten Christie to top Group C, but the Scot turned it around on day three with a 21-16, 24-22 win which earned her a semi-final meeting with second seed Narin Uluc of Turkey.

In the other half of the draw at the Badminton World Federation event, top seed Emine Seckin of Turkey takes on Spain’s Marcela Quinteros.

England’s Andrew Martin and France’s Fabien Morat made the men’s singles short stature SS6 semi-finals with hard-fought victories.

Martin prevailed over compatriot Isaak Dalglish 21-19, 13-21, 21-12, and Morat overcame an equally difficult challenger in Ireland’s Andrew Moorcroft by 23-25, 21-15, 21-10.

Morat next faces top seed Jack Shephard of England, while Martin takes on compatriot and second seed Krysten Coombs in his semi-final.

Coombs and Shephard also won their men’s doubles group match against Morat and Russia’s Alexander Mekhdiev 21-10, 21-11.

The men’s singles standing lower SL4 category saw Pavel Kulikov of Russia beaten 19-21, 21-17, 21-14 by Germany’s Tim Haller.

Kulikov will now face top seed Lucas Mazur of France, who routed Germany’s Nils Boening 21-4, 21-4, while in the bottom half of the draw another Russian, Oleg Dontsov, takes on second seed Rickard Nilsson of Sweden.

Cathrine Rosengren of Denmark won her second women’s singles match in the standing upper SU5 class to enter the semi-finals.

Rosengren beat Ukraine’s Ivanna Redka 21-8, 21-4 to follow up on her women’s doubles victory with Coraline Bergeron of France over Zehra Baglar of Turkey and Katarzyna Ziebik of Poland.

Rosengren however lost her mixed doubles match with Scotland’s Colin Leslie to Lucas Mazur and Faustine Noel 21-14, 21-15.

In the men’s singles wheelchair WH2 category, the top four seeds progressed into the semi-finals without dropping a game.

Top seed Amir Levi of Israel, second seed Martin Rooke of England and third and fourth seeds Thomas Puska of Finland and Germany's Rick Cornell Hellmann reached the last four with relative ease.

The tournament continues tomorrow.