Sherin, who is the mother of the footballer’s twin daughters, accused Boateng of assaulting her three years ago.
Testifying at a Munich court, she said the defender punched her, causing her to lose her breath, during an argument while they were on holiday.
“He grabbed my eye with his thumb. He tore my hair, then bit me in the head. He opened his lip, pulled my head back and spat blood on my face,” she told the court.
However, Boateng denied the allegations, explaining that things did not happen as Sherin had narrated.
The former Bayern Munich star could have faced up to five years in jail under Germany’s domestic violence laws.
But arriving in court on Thursday, Boateng admitted that things got tensed with his girlfriend while they were on holiday in the Caribbean.
According to a report by the BBC, the footballer said “she had become aggressive and insulting, hitting him and injuring his lip.
“When he tried to push her away from him, she fell. He said he had thrown a pillow against a table, and the lamp had fallen to the floor.”
Boateng was, however, found guilty by the court and has been fined a sum of £1.5 million.