Pep Guardiola has said he's not 'good enough' after Manchester City slipped to a 2-1 defeat to fierce rivals Manchester United on Sunday.
Josko Gvardiol put the hosts ahead in the 36th minute, with the former RB Leipzig star heading home after a deflected cross from Kevin De Bruyne.
But United staged a dramatic comeback, with Bruno Fernandes scoring a penalty before a goal from Amad Diallo right at the death.
City have struggled of late and continue to look a pale imitation of the team that has dominated the Premier League over the past few years.
Pep Guardiola has said he's not 'good enough' after Manchester City slipped to a 2-1 defeat to fierce rivals Manchester United on Sunday
PA
And Guardiola has said he's not been 'good enough', with the City boss fronting up and taking the blame following the disappointing result.
"Not much to say. No defence, they were incredibly persistent," he said.
"We have not lost eight games in two seasons. We can't defend that.
"It's not about this or that player. We gave away goals, our fault. We don't play with composure. The results are not good, the game was not exceptional. I know the situation, I understand but the reality is this.
"They have to know that these situations happen. In the box you have to be careful.
"It's not about Matheus [Nunes], he played really good in not his position at full-back. But it's not about that, we have to play better.
"The result will help us to take our best but right now we don't have it. The way I learn is to keep going.
"I'm not good enough. I am the boss, the manager, I have to find solutions and so far I haven't. That's the reality.
READ MORE: Ryan Reynolds speaks out on 'pulling away' rumours from Wrexham amid £475million investment
"We want to play better, create chances. But at the moment it's not possible."
Talking to Sky Sports, the former Barcelona and Bayern boss insisted the defeat to United wasn't his toughest as a manager.
He does concede, however, that their poor form must end sooner rather than later.
"This year it happens many times unfortunately. We gave away many things," he said.
LATEST SPORTS NEWS:
- Roy Keane makes feelings clear on Alejandro Garnacho and Marcus Rashford as Man Utd duo dropped for Man City
- Roy Keane goes on epic Kyle Walker rant during Man City and Man Utd showdown - 'I am embarrassed for him'
- Amad Diallo shows he's a superstar as Man Utd battle to dramatic derby day win over Man City
Pep Guardiola was left frustrated as Man City crashed to defeat against Man Utd on Sunday
PA
"We are not nice in the way we played. Before it's so fluid, now we're struggling for different reasons.
"A lot of defeats. We put everything in and the game was almost closed. They had more possession first half but nothing special. We give away two goals, very difficult.
"It is what it is. What can I say? We can not blame this player or that one, it's not that. It's the season, a tough season.
"We didn't play our best. We are not our best and we struggle a bit. Now we don't play for the week.
Pep Guardiola has admitted Man City must improve after they lost their derby clash with Man Utd on Sunday
PA
"Previously we didn't lose that many in two seasons. Now we've done it in eight games.
"You have to defend. We have lost a lot of games. It's difficult. We have to move on and try to find the solution and try to win games.
"I think in nine years it wasn't the toughest defeat. Champions League defeats harder.
"But at the moment, we need results to lift our mood. It's getting worse and worse. I have to find the solution. So far I didn't find it and this is the truth."
