Cesc Fabregas has charged his underperforming teammates to improve their form after suffering another league defeat.
Chelsea fell to a 2-1 loss at King Power stadium to Leicester, with Chelsea taking root at 16th and one point above relegation.
Mourinho blamed a few of his players for betraying him, and Fabregas wants his teammates to improve.
“We all have to take our responsibility, if you are a big player and are paid like a big player you have to perform and behave like a big player,” he said at a Q&A session for the New Horizons charity at Facebook in London.
“We all have bad games, but the attitude always has to be spot on and we have to be at the top of our games even when it’s not and not the behaviour that we are seeing right now from every Chelsea player.”
He added: “As a player you have pride. Ok, we cannot win right now the Premier League, but come on. We all have to do better.
“Right now it’s not the time to think about where we’ll finish. We’ve been saying it all season: we draw one game, OK, next game looks easy. But we lose.
“Next game we say the same thing, so at the end of the day I don’t think about anything, I just think that I want to beat Sunderland and play my best, and that’s it because right now, no-one is easy as it shows.
“We have been putting ourselves in this position and we have to now prove, and again, we’ve been saying that – prove, prove, prove – since the beginning, and now we really have to start winning.”
Fabregas also explained what Mourinho had said to his players at half-time on Monday night, with the Blues conceding a second goal within minutes of the restart.
“He tried to work us up and straight away they scored the second goal in the first two minutes,” he added.
“Whatever he said it really went to waste, because after that, 2-0, with the confidence they’re having at the moment it’s always going to be difficult even though we had our chances in the last 30 minutes to even equalise.”