DOHA - Olympic silver medallist Siobhan Haughey eased into the semi-finals of the women's 100 metres freestyle in Doha on Thursday, a day after becoming Hong Kong's first swimming world champion with her 200m win.

Haughey, runner-up behind Mollie O'Callaghan in the 100m at last year's event in Fukuoka, qualified third behind Australian Shayna Jack (53.50 seconds) and Fukuoka bronze medallist Marrit Steenbergen.