Chelsea manager Graham Potter has hit back at criticism that he lacks passion and does not get angry enough.
Former England defender Rio Ferdinand suggested Potter needs to be like Jurgen Klopp, Pep Guardiola or Jose Mourinho in post-match interviews.
The Blues were held to a 1-1 draw by West Ham on Saturday, when they were not given a penalty for a handball by Hammers midfielder Tomas Soucek.
"Of course I get angry, I'm a human being," Potter said of the criticism.
Hundreds of grassroots referees say they fear for their safety when refereeing and are dissatisfied with current measures to tackle abuse.
Speaking before his side's Champions League last-16 first leg at Borussia Dortmund, the Englishman said: "I'm careful not to get into discussion through the media.
"It's just that I choose to conduct myself in the way I believe I should. The same media are talking about me being more angry and then running stories about referees at grassroots level."
More than 900 referees in England responded to a Radio 5 Live questionnaire, with 293 saying they had been physically abused by spectators, players, coaches or managers.
Potter added: "It's an emotional thing but I have a responsibility to Chelsea, the game and myself to act in a certain way for me."