Two-time champion Venus Williams is back in the third round of the US Open for the first time since 2010, a year before she announced she had been diagnosed with an autoimmune disease.

The 19th-seeded Williams, at 34 the oldest woman left in the draw, did not need to deal with too much trouble while beating 78th-ranked Timea Bacsinszky of Switzerland 6-1, 6-4 on Wednesday night.

"Well, now I'm happy. I won a match again. Finally I did something I couldn't do the last couple years," Williams said. "That's good stuff."

She showed bits and pieces of the type of game that once lifted her to the top of the sport - the No 1 ranking and seven Grand Slam singles titles, including at Flushing Meadows in 2000 and 2001.

Against Bacsinszky, Williams saved all four break points she faced, converted three of 11 she earned and avoided too many unforced errors, finishing with 12 fewer than her opponent.

"I feel like I'm playing well. I feel like I play my best when my opponent pushes me, really. Once we really start to get into a slugfest, I feel like I really relax.

"Sometimes I feel like when they aren't pushing me as much, maybe I'm a little too passive at times," Williams said, rolling her eyes at that last thought.

"But I do feel ... like I can rely on myself to compete really well," she said. "So that's a good feeling."

For a spot in the fourth round, she will need to get past Italy's Sara Errani, who was the runner-up at the 2012 French Open and also reached the US Open semifinals that year.

Looking ahead to her match-up against Williams, Errani said: "I'll definitely have to raise my level of play and hit deep, try to make her move."

As recently as 2010, Williams made it all the way to the semifinals at the US Open.

But in 2011, she withdrew from the hard-court tournament before she was supposed to play Sabine Lisicki in the second round, saying she had Sjogren's syndrome, a condition that can cause joint pain and sap energy.

The American then lost second-round matches in New York to Angelique Kerber in 2012 and to Zheng Jie last year.

"The last couple years, I fought really hard and I really played red-hot opponents. So it wasn't like I didn't try. My opponents, they played so well. Sometimes you don't win 'em," Williams said.

"That's why you get up and you live to fight another day," Williams said. "So that's really what it's about for me."

(China Daily 08/29/2014 page24)