India's shuttle queen and London Olympics Bronze medalist Saina Nehwal will lock horns with Tzu Ying Tai of Chinese Taipei in the Women's Singles semi-final match of the Malaysia Open Super Series Badminton tournament at Kuala Lumpur today. Saina, who recently regained her World Number Two status, advanced into the semi-finals yesterday, after her Japanese opponent Nozomi Okuhara retired in the third game due to a knee injury.