Venus Williams moves on at Sony

KEY BISCAYNE, Fla. -- Three-time champion Venus Williams defeated Anna Schmiedlova 6-3, 6-3, as the oldest player in the women's draw at 33 advanced to the third round in her 15th time competing at Key Biscayne.

"It's good to be here still as an oldster," Williams said.

No. 2-seeded Li Na also reached the third round when Alisa Kleybanova withdrew because of a viral illness.

Kleybanova, who won in doubles on Thursday, is a former top 20-player mounting a career comeback from Hodgkin's lymphoma.

No. 3 Agnieszka Radwanska, the tournament champion in 2012, defeated Romina Oprandi 6-0, 6-4.

No. 6 Simona Halep withdrew because of a right toe injury.

Americans Sloane Stephens, Madison Keys and Varvara Lepchenko advanced. Lepchenko outlasted No. 7 Jelena Jankovic 6-3, 2-6, 7-6 (2), and Keys beat No. 31 Daniela Hantuchova 6-4, 6-2.

Information from The Associated Press was used in this report.