Heidi klum and Seal enjoying a day out together at the park with their children Leni, Henry and Johan in Beverly Hills. Los Angeles, USA - 07.09.08

The singer has two sons with his supermodel wife, Henry, three, and Johan, one - in addition to Klum's first child, four-year-old Leni, fathered by Formula 1 tycoon Flavio Briatore.

And Seal admits that the family has been receiving extra special sporting lessons from their celebrity pals.

He says, "David (Beckham) pops round to have a kick around with the kids and give them tips. He's so good with children. Sometimes his kids come over too. They really enjoy it.

"Roger (Federer) has been teaching the kids too. That's one of the joys of being connected in the showbiz industry. It's nice knowing these people. He's the greatest tennis player to have ever laced up his shoes. I've had a knock up with him too."

Source: WENN