Seal's comments are proof his divorce from Heidi Klum "is not as friendly as they were making out", it has been claimed.

It has been reported that the musician's public outburst slamming his estranged partner's recently confirmed relationship with her bodyguard stems from a financial dispute over their pre-nup.

Supermodel and TV presenter Heidi is reportedly furious about the remarks, especially after Seal was seen on a yacht in Sardinia six weeks ago with a mystery brunette.

"Heidi was enraged when she heard Seal's comments," a source told British magazine Grazia. "Especially since she knew he'd been away on holiday with another woman. It's proof that the divorce is not as friendly as they were making out."

Heidi is dating her minder Martin Kristen. When reports of their relationship spread, Seal publicly slammed Heidi for "fornicating with the help" while they were married. He has since claimed he was taken out of context, while Heidi has admitted their relationship is strained.

The couple split in January this year after seven years together.