Chelsea midfielder Juan Mata has revealed Portuguese tactician Jose Mourinho does not explain his reasons for leaving the Spanish playmaker out of his starting line-up.
Mata has been used sporadically this season - due to Mourinho's reluctance to start the attacking midfielder because of his apparent lack of defensive qualities.
The 25-year-old, who was named Chelsea's Player of the Year last season, has started only half of the Blues' Premier League games this season.
And Mata has revealed Mourinho has not explained to him why he has been left on the sidelines for a high proportion of the west London side's games.
Speaking exclusively to twentyfour7 Football, Mata said: "The way managers are depends on the way they understand the dressing room.
“Some managers will not give you any reasons as to why you are playing or not playing simply because they don’t have to. José is like that.
"Some managers will speak with you when you’re playing but they won’t speak with you when you’re not.
"I just try to keep myself going the same no matter what kind of behaviour, because as a professional, you have to be ready for every situation and whether he does or doesn’t speak to you, you should never let that in any way affect the level of your performance."
Mata was handed a rare start on Wednesday as Oscar sat out the match at the Stadium of Light with a minor ankle injury.
The former Valencia man played 81 minutes of Chelsea's 4-3 win against Sunderland - before being replaced by John Obi Mikel.
Mata will be hoping he can keep his place in Chelsea's starting line-up for the Blues' weekend clash against Stoke City at the Britannia Stadium.