Steffi Graf is pregnant

Former world number one Steffi Graf is pregnant and is due to give birth to a baby boy in November, Bild newspaper said on Thursday.

The mass circulation daily said Graf's mother Heidi had recently told friends in southern Germany about the pregnancy.

Graf, 32, and her partner, American tennis player Andre Agassi, have been together for two years. She has often talked about her fondness for children.

Bild said Graf's management company in Mannheim, Stefanie Graf Marketing GmbH, had declined to comment.

It responded to a faxed query from Bild by saying: "Frau Graf has no comment on personal matters."

Graf, who won 22 grand slam singles titles during her career and was ranked number one in the world for a record 378 weeks, spends most of her time away from Germany.

She has a strained relationship with the German media, however, partly because of her irritation at the coverage of her father's tax evasion trial and subsequent conviction.

Her father Peter was released from a Stuttgart jail in 1998 after serving half of a three year and nine month sentence for tax evasion.

Steffi Graf won Wimbledon seven times and retired in 1999 just weeks after winning the French Open.

Meanwhile, German magazine Bunte reported on Wednesday that Graf is planning to hold a big party at her brother's house in Florida on July 14, adding that there was speculation about a marriage.

Bunte said her father Peter and mother Heidi would both be there, the first time the divorced parents have been together in years.

The magazine said Graf and the 31-year-old Agassi, winner of seven grand slam tournaments, were currently working out the details of a prenuptial agreement.