California - World number four Agnieszka Radwanska easily defeated Francesca Schiavone 6-4, 6-3 in her opening match at the WTA Tour's Stanford tournament on Wednesday.
Radwanska, the top seed in the hard-court tournament, had a bye through the first round, and won 60 percent of her first serve points in the 84-minute second round contest.
She will now face sixth-seeded American Varvara Lepchenko who beat Tamira Paszek 6-4, 6-4 earlier on Wednesday.
This was the eighth career meeting between the two since Schiavone won their first match 7-5, 2-6, 6-1 in the semi-finals in Luxembourg in 2006. Schiavone went on to win the next three meetings. Radwanska, after Wednesday's match, has won the last four, all in straight sets.
Radwanska is seeking her third title of the year after winning in Auckland and Sydney. She has 12 career singles titles, including 10 on hard-courts.
In the only other match on Wednesday, fifth seed Sorana Cirstea cruised past American qualifier Coco Vandeweghe 6-3, 6-3.
Cirstea moves on to the next round where she will face Olga Govortsova who upset second seed Samantha Stosur in staight sets 6-2, 6-4 on Tuesday.