Chelsea boss Jose Mourinho explained hooking Juan Mata during defeat at Everton.
Mourinho admits Mata's performance did not impress him.
"(Eden) Hazard is playing very well and the kid is having a very good evolution, showing maturity. Juan Mata was the same level as the team was.
"The first half was quite easy to play in midfield as there was lots of space, Everton did not press a lot and it was easy to play between the lines and to get the ball and turn. When it is quite an easy game to score goals, you have to score.
"I took Mata off, I tried Oscar - the same position but a different player as Mata is more a passer, Oscar more individual creation, and maybe he should have had a penalty."
