Mauricio Pochettino slammed Chelsea's lack of consistency after they were thrashed 5-0 by Arsenal on Tuesday, saying: "When we have bad days, we are so bad." (More Football News)
Chelsea travelled to the Emirates Stadium looking to close the gap to the Premier League's top seven, but instead saw their European hopes further dented by a chastening 5-0 defeat.
The defeat was Chelsea's heaviest ever against the Gunners in all competitions, and their worst in a London derby since they lost 6-0 to Queens Park Rangers in March 1986.
The fact that dismal performance came just three days after Chelsea pushed Manchester City close in the teams' FA Cup semi-final only served to rile Pochettino.
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"We are showing this inconsistency and that is why we are where we are," Pochettino said.
"We are able to have an amazing performance and then one like this. When we have bad days, we are so bad. It's difficult to talk. We were talking in the same way after last season.
"We put in a fantastic performance at Wembley and then today, you can lose a game at Arsenal but in the way we competed… why one day, three days ago and then today in this way?"
Chelsea have now conceded 57 goals in the Premier League this season, their outright most in a single campaign in the competition, having previously shipped 55 in both 1994-95 and 1996-97.
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In attack, they managed just one shot on target in the absence of Cole Palmer, with the Premier League's joint-leading goalscorer missing out due to illness.
Asked about the impact of losing Palmer, Pochettino added: "It wasn't the reason we lost the game, but you lose such a creative player that helps to play in the lines.
"It's difficult to lose players in these circumstances – that made the management very difficult. But today was more than that.
"We didn't compete from the beginning and it was difficult to be in the game against a team fighting for the Premier League. It's no coincidence.
"We need to compete in a different way but we are talking too much. We want to be in a different position next season. We need to take decisions."
