Harry Redknapp is seeking to rumble West Ham plans for Eupen winger Henry Onyekuru.
The Daily Mail says Birmingham have made an ambitious £7.5m offer for West Ham target Onyekuru.
Brum boss Redknapp has confirmed the Championship side have made a contract offer to former Chelsea captain John Terry but they intend to add greater quality throughout the squad.
West Ham have been told they will have to pay £7.87m for Eupen winger Onyekuru to aid his chances of gaining a work permit.
Birmingham's offer is understood to be the largest on the table for the Nigeria international at this stage. However, they will also be wary of pushing their squad expenditure close to FFP guidelines.