NEW YORK (Reuters) - Wimbledon champion Venus Williams marched into the fourth round of the U.S. Open with a commanding 6-2 6-1 victory over Ukrainian 27th seed Alona Bondarenko on Saturday.

The American seventh seed hammered down nine aces and lashed 32 winners to set up a clash with ninth seed Agnieszka Radwanska of Poland.

"It always helps when I don't make a lot of errors," Williams said in a courtside interview.

"She is a very good player, very consistent, so I knew I had to be aggressive and it all went well today."

The 2000 and 2001 champion, who last reached the final in New York in 2002, fired three aces in the opening game of the match and never looked back.

After easing through the first set, she stepped up another gear in the second and romped to victory in 56 minutes.

(Writing by Simon Cambers, editing by Steve Ginsburg)