Kim Clijsters is set to announce her comeback two years after retiring from the game to have a baby.
The 25-year-old former world number one is expected to announce a schedule later this week, including plans to play at the US Open in September.
Belgian Clijsters, who gave birth to her daughter last February, has recently been in training and will play World Team Tennis in the United States in July.
She won 34 singles titles before retiring, including the US Open in 2005.
Clijsters will hold a press conference in the Belgian town of Bree tomorrow.
"For six or seven weeks Kim has trained here regularly, up to three hours per day," revealed Robert Devries of Bree tennis club in Het Belang van Limburg.
"And I don't think that she does that only for exhibition duels."