This story is freely available to our readers. Please consider supporting SCMP’s journalism by subscribing . After her historic silver medal in the 200m freestyle yesterday, Siobhan Haughey returned to the Tokyo Aquatics Centre in the semi-finals of the 100m free. The 23-year-old set two Asian records on Wednesday, including the 52.70 she swam in her 100m free heat last night, and duly aded another by shaving 0.30 seconds off that time as she stormed into the final. Tang Chun-man and Tse Ying-suet also took to the court in the semi-finals of the badminton mixed doubles, where they had their work cut out against top seeds Zheng Siwei and Huang Yaqiong of China. The Chinese pair beat Tang and Tse 2-0, but the Hong Kong duo will still have a chance to win bronze. Elsewhere, Winne Hung Wing-yan rowed in the C/D semi-finals of the single sculls and made D. Windsurfer Hayley Chan Hei-man qualified for the medal race, though Michael Cheng Chun-leung missed out, and sailor Stephanie Norton finished 37th in race 8 of the laser radial. Reporting by Paul Ryding and Jonathan White (in Tokyo), Josh Ball, Patrick Blennerhassett, Chan Kin-wa, Nick Atkin, and Andrew McNicol.