EMMA RADUCANU struggled with a stomach bug during a marathon second-round loss to Wang Yafan at the Australian Open.

The former US Open champion, playing only her fourth match since returning from eight months out and three surgeries, had battled back strongly from a set and a break-down to force a decider.

But Raducanu then began to show a lot of discomfort, clutching at her chest and abdomen before calling the trainer two games in.