The Chelsea signing who is more important than Diego Costa

Cesc Fabregas's start to life at Chelsea has arguably been even more important to the side than the arrival of Diego Costa.

As the third went in against Swansea City, Roman Abramovich leapt from his seat, feverishly clapping his latest purchase.

The Russian billionaire is an unassuming individual. For all the millions he has invested in Chelsea since purchasing the club back in 2003, Abramovich has stayed silent. He doesn't do interviews, doesn't seek the limelight yet he feels omnipresent figure at Stamford Bridge.

When taking over the Blues, Ambramovich expressed a desire for his side to be playing the most aesthetically pleasing style in the land.

Yet, as he has watched his expensively assembled creation surge to success, there has almost always felt a quiet dissatisfaction at the product.

Chelsea have been the Premier League's bully boys on-and-off the field for some time. Their play on the pitch was defined by their physical edge.

In their most successful period the bludgeoning Didier Drogba, the destructive Claude Makelele and the robust John Terry formed the spine of the team as they intimated opposition teams.

Off it, too, they had greater financial muscle than any other side in the country - although the playing field is overtly more equal nowadays.

It was this strength that allowed Chelsea to compete, but this season it all feels... different. The physical prowess remains in Nemanja Natic, but he is only one cog in a sparkling machine.

It is not just a functional operation. Manager Jose Mourinho looks to have a unit available to him more equipped than any other in the league.

The faults in it last season's design have been eradicated, righted admirably by their £32 million signing over the summer.

Diego Costa has stolen all the headlines after the impact his arrival at Stamford Bridge has made. With seven goals in his first four games, he has added weaponry to a team which appeared to have a barracks, but little ammunition last year.

However, every dagger needs a craftsman and although Chelsea have a piercing edge to their attack, it would unquestionable by less potent without Cesc Fabregas moulding its shape.

The Spaniard has already racked up six assists during what has been a stunning return to English football. Fabregas has already proven his quality in the England's top flight at Arsenal, and his arrival back on these shores has only gone on to confirm his status as one of the best players in the division. 

It has gone rather unheralded because of the impact Costa has had, but Fabregas's importance to this Chelsea time cannot be overstated. if he continues this fine form, then Mourinho's side's capture of their first Premier League title since 2010 looks inevitable. 

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