3) A world-class midfield
A good defense is integral to the team, but a good midfield is always the reason why teams click or fail. Barcelona had Xavi and Iniesta in their glory days and Real Madrid boasted of the Kroos-Modric combination. The number of quality midfield options at the moment is giving the manager a serious headache at the moment.
At the base of the midfield, Chelsea have the indisputable Jorginho who has slowly grown into becoming the heartbeat of the team. He makes the team tick with his turns and the huge amount of passes he plays. It looks as if he has finally adapted to the league and is even better than the Jorginho he was at Napoli under Sarri.
Sarri's brilliant move of using the tenacity of N'Golo Kante is finally paying dividends as the world starts to understand that his endless work-rate makes him much more than a traditional defensive midfielder. With Kante recently quoting that he is going to stay at the club for years to come, it's happy days for the fans. Mateo Kovacic has turned a new leaf this season and he expertly combines his physicality with dribbling to cause opponents all kinds of headaches.
Mason Mount has been in supreme form this season and is finally justifying himself as the player who can carry on Lampard's legacy. Ross Barkley is inconsistent but on his day, he can rip through teams single-handedly. Billy Gilmour reminds fans of Fabregas and his endless work rate makes him one to keep an eye out for. Not forgetting that Ballack's succesor Ruben Loftus-Cheek is yet to return from injury, Frank Lampard is the most worried person regarding team selection right now.
On the brighter side, Chelsea's midfield is going to get better with time and there's no reason why they can't be a dominant force in world football in the years to come.