Chelsea interim manager Rafael Benitez has insisted that he is not worried about jeers from the club's fans.
The Spaniard, whose appointment at Stamford Bridge was met with protests, saw the Blues endure a 2-2 away draw with League One side Brentford in the fourth round of the FA Cup on Sunday.
"I have said before that I am just concentrating on my job," BBC Sport quotes him as saying. "I try to stay really focused and I can guarantee Juan Mata changed the game when he came on.
"The club said they wanted a manager with experience and I will try to do my job."
Chelsea are currently third in the Premier League.
