However, he insists there won't be any punishment for his players.
Lampard explained: "I've been in a dressing room playing after those games and I've been in the dressing room after those games in seasons when we've ended up winning the league or Champions League; that's normal.
"So I'm not going to stand here and draw a line between me and my staff and the players. I understand how they feel and I feel like it now.
"So it won't be a hard week where I get them in on Sunday morning and watch the video for two hours.
"We've got a long week where they can go away a little bit and have some time with their families, and when we work we work properly, and we focus on the Tottenham game.
"I can't find anyone wanting in terms of how we apply ourselves.
"But what we do on the pitch is the main thing. And at the minute we do have to understand that it's not good enough."