The Serbian was re-signed in January 2014 from Benfica.
In January Chelsea completed the signature of the defensive midfielder Nemanja Matic from Benfica for £21 million. the Serbian international had long been on their wish-list, ever since he started proving them wrong.
Because of course Matic was previously at Chelsea before they re-signed him less than a year ago.
The midfielder signed for Chelsea in 2009 from MFK Kosice for a fee in the region of £1.5 million. But after failing to break into the first-team he was included in the £21 million deal for David Luiz when he arrived from Benfica.
But three years later they wanted to snap him up once again.
Now they have he has become a major part of Jose Mourinho's team. In fact, some might say he is the most important member of the team and first name on the team-sheet.
And despite being let go by Chelsea Matic is not bitter about his previous treatment at the club.
Speaking to Tubes for Soccer AM on Sky Sports Matic stated:
"No. When I first came to Chelsea I was very young. My position was among big players, bigger names. You know it was difficult for me to play. Now I am 26 and it is different of course. I have some experience and I improved a lot and I came to show that yeah, I can play in the Premier League, I can play for Chelsea and I am happy in this moment."
Chelsea fans will hope his form can continue against Sunderland this evening.