Matic is the typical holding player. He will stay deep, win the ball and move the ball up in an efficient manner. Jorginho is what the Italians call a Regista ie a deep lying playmaker on steroids. He's quite an engine (average 11km+ per game), he's constantly in the thick of the action (according to OPTA he's in the top 5 list in Europe with most touches of the ball) and his passing is brutally efficient (around 91% successful passing). So were he will play? He won't be replacing Matic that's for sure. Matic is 6ft4 and is built like a brick wall. Even the most cultured of defensive midfielders (Carrick) was 6ft3. Jorginho is 5ft11 and is certainly not built to be the main defensive midfielder. What Jorginho will do is to slot right in between Matic and Pogba. The former is purely DM, the other is purely AM, Jorginho will aid both. As said he's quite an engine so he'll help Matic win the ball. On the other hand his long range passing will allow Jorginho to contribute in the creative department. Currently we can't afford not playing Matic as Herrera doesn't contribute enough in DM and Pogba's contribution at the back is rather limited (pathetic really). With Jorginho in the team we can afford playing TFM as Jorginho will surely help him out.