The striker's situation is in doubt this month and he has been linked with Eintracht Frankfurt.
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However, Newcastle management insist no contact has been fielded and insist they won't entertain "time wasters", says ChronicleLive.
Manager Eddie Howe's wish is to hang onto Osula this season as a third-choice striker behind Nick Woltemade and Yoane Wissa.
But there is also an acceptance that at this stage in Osula's career, he needs regular football, so opening up the prospect of a loan departure in January.