Kim Clijsters welcomes son Jack Leon with hubby Brian Lynch

Kim Clijsters and husband Brian Lynch welcomed their second child- son Jack Leon Lynch- in Belgium, on Wednesday.

The new mom confirmed the news on Twitter, People magazine reported.

She wrote that the baby's elder sister- Jada Ellie, mom and daddy were very proud and happy.

Tennis ace, Clijsters, who retired after the 2012 U.S. Open, announced her pregnancy in February.