Beijing - Czech world number four Petra Kvitova thrashed Serbia's Bojana Jovanovski 6-1, 6-2 in the second round of the Shenzhen Open on Tuesday.
The 24-year-old double Wimbledon winner and second seed broke Jovanovski twice in the first set.
The Serbian, ranked 56, offered a little more resistance in the second set, earning three break points. But she failed to take any of them and Kvitova wrapped up the match in one hour and two minutes.
Kvitova hit six aces in her victory, which was even more comprehensive than her trouncing of home wild card Duan Yingying in the first round of the $500 000 WTA tournament on Monday.
Home player Zheng Saisai took nearly two hours to overcome Slovenia's Polona Hercog 6-3, 2-6, 6-2.
In the day's only other singles match, Kazakh number four seed Zarina Diyas breezed past Timea Babos of Hungary in straight sets, 6-3, 6-4.