Top seed Ash Barty maintained her lead in matches won this season (26) as the Australian posted a 6-4, 6-1 defeat of Kazakh Yaroslava Shvedova for a third-round place at the Rome Masters on Wednesday.
But second seed Noami Osaka hit the buffers in a 7-6(2), 6-2 defeat at the hands of Jessica Pegula of the US in 90 minutes with the winner breaking four times.
Barty took slightly more than an hour and a quarter for victory over the No. 665 Shvedova who ranked 25th before surgery and motherhood.
Barty will be looking to break new ground after duplicating her career-best third-round at the Foro Italico.
The seed went down an early break but recovered to win as she broke on five of six chances and tacked on seven aces in victory.
Two-time champion Elina Svitolina, the fifth seed, needed a fightback to eliminate American teenager Amanda Anisimova 2-6, 6-3, 6-4.
The Ukrainian winner was broken three times to lose the opening set but began her recovery by saving a break point which would have given her opponent a 2-0 lead in the second.
American teen Coco Gauff put out Greek Maria Sakkari to progress 6-1, 1-6, 6-1.
Main photo:- Ash Barty in action in Rome – ©WTATennis.com