Chelsea coach Steve Holland says it is not easy to understand why players were booed during Saturday's 3-1 win over Sunderland.
Fans exposed a banner with the words "The Three Rats - Hazard, Cesc and Costa" at Stamford Bridge and booed Cesc Fabregas and Diego Costa when their names were announced before the game.
But Holland says what is important is to look forward after the club hired an experienced manager.
"It's a difficult question for me to answer," Holland is quoted as saying by the BBC.
"My personal situation would be last season we won the Premier League and the League Cup and I felt part of that. When things aren't going well you have to accept equal responsibility if you are involved.
"As far as I am concerned I am always involved in the bad periods as well as the good periods. It's an issue of collective responsibility.
"It's difficult for everyone. Obviously the supporters have a right to express their opinion. I have to say I am not a big social media guy, that's not a road I go down but clearly the fans had a view on certain things today and it is their right to do that.
"I don't know Guus [Hiddink] well but I have spoken to Ray Wilkins who has worked with him before to try and get an idea of the sort of guy he is. Ray was very complimentary on the football and as a person.
"My own view is that we need an experienced manager. We had one, and now we have another."
