I get the feeling that sometimes technical terms are thrown around without everyone agreeing on what they actually mean.
I turned to technical football website The False Nine for a definition of the double pivot.
"The Double Pivot
The trend of using the second striker as the play maker emerged in the 1986 World Cup, the most famous example being Maradona. Once more and more teams started adopting this, a 4-2-3-1 formation was inevitable. Opposition teams reacted by playing a holding midfield player to pick up the playmaker. The downside was that this allowed the lone striker to drift into wide areas, leaving space in the middle. To prevent this, two holding midfield players were employed and the Double Pivot was born. Slowly but surely teams realised the importance of having possession and not being over run in the midfield and many turned to the 4-2-3-1.
Of course every manager and every team has its own interpretations of this system, but most see the double pivot as the use of two holding mid-fielders in front of the defence; one generally more creative than the other - the "Deep Lying Playmaker". All four semifinalists at the 2010 World Cup used the double pivot. Spain, Holland and Germany all made their own interpretations of the 4-2-3-1. Uruguay played on paper with a classic 4-4-2, but unlike in a typical 4-4-2 where the two Central Midfielders were allowed some sort of freedom, the Uruguayan central midfielders stayed back and acted as a double pivot.
The Double Pivot or the players playing in that position are the ones who determine the tempo so the overall setup of the team is dependent on them. You choose Busquets and Alonso as your double pivot, like Spain did, you will dominate possession. Or if you are Germany and play with Bastian Schweinsteiger and Sami Khedira,you would be devastating on the counter with Sami's energy and Bastian's intelligence. Or you can also park the bus like Netherlands did against Spain in the world cup final with Van Bommel and De Jong."
So can Matic and Fabregas work as a Double Pivot for Chelsea?
Jose had no problem last season setting us up against top four competitors. We lost the Prem because of our results against Palace, Villa, Sunderland, Everton and Newcastle. Whatever you think of Fabregas personally, I can't see how him and the Spider wouldn't be a tremendous force in opening up teams who park the bus. He has played extensively in England so wouldn't take a season to acclimatise. He doesn't mind getting stuck in. The tendency of the Arsenal team to want to walk the ball into the net wasn't solely down to him and hopefully he will take a more direct approach. He scores goals from midfield.
Is he the best person for the job? I don't know. Would I be gutted if we signed him for the same sort of money that Luke Shaw and Lallana are being offered around? Definitely not.