Billionaire property magnate Vladislav Doronin sues his ex-GF Naomi Campbell

Naomi Campbell could be set for a court showdown as her Russian billionaire ex-boyfriend 'is suing her for outstanding loans'.

Vladislav Doronin, 57, is also understood to be claiming the British supermodel kept some of his property. The Russian businessman valued his belongings at $3million and said Campbell, 50, has refused to return them, legal documents seen by TMZ show. 

It was not immediately clear in which court the documents were filed or how much Doronin claims Campbell owes.