BRUSSELS, Belgium -- Justine Henin, the world's top-ranked women's player and winner of seven Grand Slam titles, planned to make a major announcement today amid reports she will quit the sport.

The 25-year-old Belgian, who has been in a bad slump all spring, called a news conference for 10 a.m. today.

Belgian newspapers reported she was retiring.

Her announcement could range from dropping off the tour for a limited amount of time, to retiring at the end of the season or quitting tennis immediately.

WTA Tour officials in Rome said they'd not received any official communication from Henin.

Henin, who has battled through injuries and a divorce, had a standout season in 2007, winning two Grand Slam championships, eight other tour titles and over $5 million.

However, after winning her home tournament in Antwerp in February, she has been on one of the worst skids of her career, failing to go beyond the quarterfinals at any event.

Henin's year began with a 6-4, 6-0 loss to Maria Sharapova in the Australian Open quarterfinals in January, followed by a 6-2, 6-0 drubbing by Serena Williams at the Sony Ericsson Open in April, the worst loss for a top-ranked player in nine years.

At last week's German Open, Henin was upset 5-7, 6-3, 6-1 by Dinara Safina in the third round, and then pulled out of this week's Italian Open, citing fatigue.

Last year, Belgium's Kim Clijsters -- a former No. 1 player -- retired at age 23. She has since gotten married and become a mother.

-- The Associated Press