Credit: Twitter

Kim Clijsters and her family can now play mixed doubles.

The 29-year-old former tennis star and husband Brian Lynch have announced on Twitter that they're expecting a baby boy.

The couple got married in 2007 and have a five-year-old daughter named Jada.

Kim, who was born in Belgium, won four Grand Slam singles titles in her career before retiring last summer, in part to spend more time with her family.

On March 25, Brian tweeted:

She and basketball player Brian are expecting this fall.

Congrats to the happy family!

Source: Twitter