MELBOURNE, Australia -- Now that she's 42, Kimiko Date-Krumm is older than some of her opponent's parents.
Her memory is starting to get fuzzy, too. She can't remember whom she played when she last won a match at the Australian Open -- but she remembers it was way back in 1996.
After the match, she fielded a variety of questions about her secret to longevity in a sport filled with women half her age.
"Some players' mothers are younger than me," she laughed. "So it's like [they're] my daughter."
Her advice to keeping fit: "I sleep a lot. I eat healthy foods. I drink a lot," she said. Bedtime is usually before 10. "It's a simple life, that's it. Nothing special."
The mind-set that comes with her advanced age has helped her, she said, as did a long period of absence from the sport.
Date-Krumm, who is married to German race car driver Michael Krumm, took a 12-year break from tennis and returned in 2008.
"After I stopped playing tennis in 1996, I never thought I would come back on the tour. But I love sports. I love tennis," said Date-Krumm, who is ranked No. 100 and has won eight tour titles and more than $3 million in prize money during a career in which she was ranked as high as No. 4 in 1995.
Since her comeback, she has failed to advance beyond the second round of a major. But she has amassed a number of "oldest player" records. Among them: At 39, during the 2010 French Open, she became the oldest player to beat a top-10 player. She then beat her own record later that year in Osaka after turning 40.
Date-Krumm made her Grand Slam debut at the French Open in 1989 when Petrova was just 6 years old.
Date-Krumm cruised through her match against the 30-year-old Petrova in 64 minutes. She made 75 percent of her first serves; Petrova stumbled with 38 unforced errors.
"She's a tough cookie," said Petrova, a 2010 quarterfinalist at Melbourne Park. "She played really well today. She didn't give me any room to come back."
Petrova agreed that a vacation from the sport that requires rigorous travel around the world could be a good thing.
"She took a 10-year break," Petrova said, "so you know she might be fresher than most of us in our 30s."