RETIRED Australian tennis pro Casey Dellacqua is expecting another addition to her family of four.

The exciting news comes six months after Dellacqua retried from the sport to spend more time with her partner Amanda Judd and children Blake and Andie.

Dellacqua took to social media to share the news, telling her fans this time she is pregnant, with their third child due next year.

“Baby, baby....baby ohhhhhhh .... it’s my turn to carry our child this time,” the tweet read.

“Amanda and I are so excited to share with you all we will be growing out family by one. ETA March 2019.”

Several people commented on her tweet, including Judy Murray, mother of champion Andy Murray, who said “Lovely news!!!!”

The Perth-born left-hander turned pro in 2002 and while she played in singles tournaments, Dellacqua had most of her success in the doubles.

She also represented Australia at the Beijing and London Olympics.

In her last professional match, Dellacqua alongside Ash Barty delivered Australia a 3-2 victory over Ukraine, winning the first round of the Fed Cup World Group II in Canberra in February.