Roundup: Dominant Sinner, Swiatek power into Australian Open semis

MELBOURNE, Jan. 22 (Xinhua) -- Defending champion Jannik Sinner shrugged off health concerns with an evisceration of eighth seed Alex de Minaur on Wednesday, while women's second seed Iga Swiatek also stormed into the Australian Open semifinals.

There had been concern over Sinner's fitness after he fought through illness during his gruelling fourth round victory over 13th seed Holger Rune.

There was specu