SC Paderborn sports chief Martin Przondziono insists they won't be pressured into selling Streli Mamba.
The youngster is being linked with a January move to West Ham.
But Przondziono says they're under no pressure to sell.
With a contract until 2022, Przondziono says: "We decide alone what happens to him..."
Mamba has scored five goals in nine games so far this season.