Roundup: Swiatek-led Poland, host Australia power into United Cup quarters

PERTH, Australia, Jan. 1 (Xinhua) -- World No.1 Iga Swiatek was in sublime form on Monday to power Poland into the United Cup quarterfinals, while host Australia also progressed.

Swiatek was under pressure when she hit the court in Perth after Alejandro Davidovich Fokina gave Spain the lead with a comeback 3-6, 6-3, 6-4 victory over world No.9 Hubert Hurkacz.

But Swiatek, winner of four Grand Slam titles,