According to media reports, the Nigerian, who has already been to Milan for a medical, will return to Germany for the time being despite the two clubs having previously agreed a loan deal.
According to Kicker, Milan have decided against signing the 24-year-old due to abnormalities in the medical tests. The problems in the striker's right knee had raised doubts among those responsible at the Italian top club.
However, there could still be a turnaround in events if Milan cannot find another candidate, but according to Kicker, this is unlikely.
Victor Boniface tore cruciate ligaments in 2019 and 2020 and was out for a long time at the start of 2024 due to an adductor injury. He also only started four of 16 Bundesliga matches in 2025.
His contract at Leverkusen runs until 2028, and the out-of-form striker currently has little chance of becoming a regular behind goalscorer Patrik Schick.
In January, Boniface had already agreed to a transfer with Al Nassr from Saudi Arabia, which surprisingly fell through. As a result, Boniface was unable to build on his performances from the double-winning campaign and the first half of the last season.