LONDON Wimbledon defending women's champion Venus Williams says one title at Wimbledon wasn't enough to change her life and has warned her rivals that for her only a repeat will do.

Venus ousted fellow American Lindsay Davenport in last year's final to become the first black American woman to lift the famous plate since Althea Gibson in 1958 -- but the 21-year-old says while she was delighted to take what was her first Grand Slam title she will only be satisfied with more wins.

"Winning Wimbledon is not enough. You've got to do it twice again to prove it wasn't a fluke!" Was how Venus saw her duty over the coming fortnight, which she starts with an opening-round match against Japan's Shinobu Asagoe.

And she said first time round had left her only with the feeling that she wanted more.

"It wasn't as exhilarating as I thought. It wasn't as important as I thought it would be.

"It didn't change my life -- I was the same person afterward," she explained.

The world number two said she needed no reminding how a clutch of rivals are after her crown.

Current number one Martina Hingis seeking a first Grand Slam title since the 1999 Australian Open, Jennifer Capriati bidding for a hat-trick of crowns this year following the Australian and French titles and Davenport desperate to go one better this time.

"I've just taken over her position at number two and I'm sure she'll want it back," laughed Venus, regarding her rivalry with Davenport, who was in sizzling form in winning Eastbourne last week.

Williams, who went on to win the U.S. Open after last year's success here, said she felt under no special pressure as defending champion, AFP reported.

"I've no problem being defending champion. I think it's an honor," she told BBC Radio.