Miami - Venus Williams eased into the third round of the Miami Open with a comfortable 6-3 6-2 win over Poland's Urszula Radwanska on Thursday while Caroline Wozniacki also progressed.
Williams has been away from competition for almost a month but she needed just 66 minutes to beat the younger sister of 2012 Miami winner Agnieszka Radwanska.
Williams was not at her best, she made 24 unforced errors but produced 22 winners to Radwanska's four and her passage to the next round was never in doubt.
"She's definitely a tricky player. She puts so many balls in play. And it was a little windy today - I just had to keep my feet moving and pray my balls were going in," said Williams, who will face Australian Sam Stosur in the next round after she defeated French qualifier Pauline Parmentier 6-1 3-6 6-0.
Fourth seed Wozniacki had no trouble in dealing with American Madison Brengle 6-0 6-1 to set up a meeting with Estonian Kaia Kanepi.
Agnieszka Radwanska had a tougher battle, surviving a strong test in the second set to earn a 6-4 7-5 win over Slovakia's Anna Schmiedlova.
Russian second seed Maria Sharapova was facing compatriot Daria Gavrilova later on Thursday.
Top seed Serena Williams will be in action on Friday against Romanian Monica Niculescu, while third seed Simona Halep takes on Czech wildcard Nicole Vaidisova.Results on Thursday from the third day of the ATP and WTA Miami Open (x denotes seeded player):
Agnieszka Radwanska (POL x7) bt Anna Schmiedlova (SVK) 6-4, 7-5
Irina Begu (ROM x31) bt Tereza Smitkova (CZE) 5-7, 6-4, 6-4
Alize Cornet (FRA x22) bt Elena Vesnina (RUS) 6-4, 6-1
Carla Suarez Navarro (ESP x12) bt Stephanie Voegele (SUI) 6-3, 6-1
Venus Williams (USA x16) bt Urszula Radwanska (POL) 6-3, 6-2
Samantha Stosur (AUS x23) bt Pauline Parmentier (FRA) 6-1, 3-6, 6-0
Kaia Kanepi (EST) bt Varvara Lepchenko (USA x28) 6-2, 6-4
Caroline Wozniacki (DEN x4) bt Madison Brengle (USA) 6-0, 6-1
Ekaterina Makarova (RUS x8) bt Karin Knapp (ITA) 6-1, 6-3
Elina Svitolina (UKR x26) bt Bojana Jovanovski (SRB) 6-3, 7-6 (7/3)
Kristina Mladenovic (FRA) bt Barbora Zahlavova Strycova (CZE x19) 7-5, 6-2
Andrea Petkovic (GER x9) bt Christina McHale (USA) 6-2, 6-2
Karolina Pliskova (CZE x14) bt Annika Beck (GER) 2-6, 6-3, 6-4
Paula Badosa Gibert (ESP) bt Zheng Saisai (CHN) 6-1, 7-5
Kurumi Nara (JPN) bt Caroline Garcia (FRA x25) 6-3, 7-6 (11/9)
Daria Gavrilova (RUS) bt Maria Sharapova (RUS x2) 7-6 (7/4), 6-3
Martin Klizan (SVK) bt Paolo Lorenzi (ITA) 6-3, 6-4
Steve Darcis (BEL) bt Malek Jaziri (TUN) 2-6, 7-5, 7-5
Thomaz Bellucci (BRA) bt Lleyton Hewitt (AUS) 7-5, 6-7 (2/7), 6-4
Alexandr Dolgopolov (UKR) bt Ricardas Berankis (LTU) 6-4, 6-1
Mikhail Kukushkin (KAZ) bt Steve Johnson (USA) 6-4, 3-6, 6-2
Alejandro Falla (COL) bt Michael Berrer (GER) 6-7 (5/7), 6-4, 6-4
Federico Del Bonis (ARG) bt Jir Vesely (CZE) 7-6 (7/4), 3-6, 7-5
Alexander Zverev (GER) bt Sam Groth (AUS) 7-5, 6-7 (5/7), 6-4
Mikhail Youzhny (RUS) bt Andrey Golubev (KAZ) 4-6, 6-2, 6-3
Simone Bolelli (ITA) bt Marcos Baghdatis (CYP) 6-2, 6-2
Borna Coric (CRO) bt Andreas Haider-Maurer (AUT) 1-6, 6-3, 7-6 (7/3)
Jerzy Janowicz (POL) bt Edouard Roger-Vasselin (FRA) 6-4, 6-2
Vasek Pospisil (CAN) bt Juan Martin del Potro (ARG) 6-4, 7-6 (9/7)
Andrey Rublev (RUS) bt Pablo Carreno-Busta (ESP) 1-6, 6-1, 6-4
Jurgen Melzer (AUT) bt Ryan Harrison (USA) 7-6 (7/3), 6-3
Teimuraz Gabashvili (RUS) bt Pablo Andujar (ESP) 0-6, 7-6 (7/4), 6-3