Heitinga has featured just twice this season for Everton, both times in the Capital One Cup, with 19-year-old John Stones picked ahead of him at centre-back in Saturday's 4-0 victory over Stoke. Fiorentina have been heavily linked with a move for the Holland international and Martinez said Everton will 'try to help' the defender in the winter transfer window. "Johnny has been an incredible professional since day one," said the Toffees boss. "He has been a big influence in the way we wanted to work. "Johnny is a top footballer and we can understand if he doesn't play many minutes we will try to see if we can help him in January.