German newspaper Stern claims that Michael Schumacher has been told to improve . He does n't need anybody to defend him , certainly not me , but we are very happy with the job he 's doing But Mercedes chief Peter Haug denies that 41-year - old was given ultimatum . Seven - time world champion languishing 10th overall in his comeback season . German manufacturer Porsche announces it may return to F1 racing for first time since retirement .
German newspaper Stern claims that Michael Schumacher has been told to improve . But Mercedes chief Peter Haug denies that 41-year - old was given ultimatum . Seven - time world champion languishing 10th overall in his comeback season . German manufacturer Porsche announces it may return to F1 racing for first time since retirement .