Diego Costa has been a calmer player this season than he was last season and in his debut season at the club.
The Brazilian-born Spain international is well-known for being at the edge and arguing with the referees and players of other teams.
He has been a much different player this season and he has revealed why.
He told the official Chelsea website: “The suspensions I received made me reflect. I stopped and thought about it. I realised I was the only one losing out at the end of the day. Back then sometimes I thought the suspension was unfair and that I was right and the others were wrong, that they were exaggerating. But either way I was always losing out. So it was a question of either letting them send me out all the time or changing, because with no change from my part I would never be playing, never enjoying.
“So I decided to avoid arguments with referees, with players from the other teams. I just knew they would not let the slightest thing pass, not with me.”