Inter Milan striker Mario Balotelli has sparked a Manchester derby for his services.
Sky Sports Italia says while Manchester City have made a firm approach to Inter for the controversial forward, United have informed the Serie A champs they will match any offer their neighbours make.
Balotelli has declared in the past week he is willing to leave Inter for England this summer - and would welcome the chance to play for his former Inter coach Roberto Mancini at Manchester City.
But unlike City, Manchester United can offer Balotelli immediate Champions League football next season.
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