Everton boss Rafa Benitez hit back at jeering fans after defeat to Crystal Palace.
The visiting fans vented their fury during a limp, error-ridden Everton display with cries of "red and white sh***" aimed at Benitez.
The heat was cranked up on Benitez when he replaced Richarlison with Salomon Rondon but he argued: "When you are disappointed that your team is not doing well you can be emotional and react but the reality is this kind of substitution has been right.
"Rondon came on and was holding the ball, giving us something more and after he scored the goal.
"We tried to do the best for the team. We can make mistakes but we know the players and how they are and we tried to make the right decisions."
He added: "Richarlison has a problem with his calf. We tried to make the substitution at half-time. He said he wanted to try the second half. It was obvious he was not at the level we were expecting."