The model girlfriend of footballer Jerome Boateng has been found dead just a week after the pair split up.

Kasia Lenhardt, 25, was found by police in a Berlin apartment with the footballer's initials on the door on Tuesday night, as officers said the death is not being treated as suspicious.

Kasia, who had a son from a previous relationship, had been dating 32-year-old Boateng for 15 months before the pair announced their split on February 2 amid a vicious fight that saw the couple use social media and the press to exchange blows.