Maurizio Sarri wants Chelsea to buy Mateo Kovacic.
The Croatian midfielder is on a season-long loan at Stamford Bridge from Real Madrid.
His performances have attracted some criticism and there have been reports that he will return to Real at the end of the campaign.
But Chelsea head coach Sarri insists signing Kovacic would be a wise investment.
“He is only on loan of course, but I’d like very much that Kovacic will stay with us,” said Sarri.
“In my opinion Kovacic could become a very good central midfielder.
Any deal would depend upon Chelsea successfully appealing against a transfer ban imposed by Fifa or at least having it suspended.