Chelsea boss Frank Lampard defended the players after their home defeat to Brentford.
The Bees won 2-0 via a Cesar Azpilicueta own goal and Bryan Mbeumo's late effort.
Lampard said: "Brentford do what they do very well. They have a really effective style with set pieces.
"In this moment, sometimes football bites you on the bum and that happened today.
"Tactics, we played against Real Madrid we played a really good game for 60 minutes. We missed out chances and we lost that game. Today we were a back three and really secure but not as much as a threat as wanted to be. Then we went to a back four for more of a threat and then the counter can do you.
"We're talking confidence here because the mentality wasn't wrong in the players today. We have all got pride. You have to keep fighting until the moment comes."
On the boos at full time, he added: "No problem with that, completely understand it. I know these fans very well and they stick by their team. They feel down because they are used to success and they want that success all the time as we all do. I absolutely understand it, we as players and staff have to take it on the chin because they want results.
"I can say to the fans now that the players are showing application. Brentford had one shot on target and scored two goals, that kind of says it all tonight."
