Serena Williams brushed aside former world number one Caroline Wozniacki 6-1 6-4 to advance to the semi-finals of the China tennis Open.
The top-seeded American will meet third seed Agnieszka Radwanska in the final four.
Ninth-seeded Czech Petra Kvitova rallied to beat home favourite Li Na, seeded fourth, 4-6 6-2 6-4.
The former Wimbledon champion set up a semi-final date with Serbian Jelena Jankovic.
