Despite spending over £200m on players over the last season, Jose Mourinho still doesn't have the right cogs for his system.
But if Mourinho is to lead a resurgence, Terry is adamant he must buy several players that suit his style of football.
Speaking on Matchday Live, Terry said: "Individually he will be looking at three or four more players in certain areas.
"He needs his real team of what identifies him as a manager, I don't think he has really got that at the moment.
"We see different players coming in at different times at the moment but given time, he will get it right."