Thomas Tuchel admits he has been left "very tired" by Chelsea's hectic programme and puzzled by their dreadful form at Stamford Bridge.
The Blues head coach said the demands since the international break have put him under strain, and he described Chelsea's form as "fragile".
While Tuchel appreciates managing the busy run of games is all part of the job, he is concerned by the rapidly rising number of costly individual errors that have crept into his team's performances.
Since Chelsea's players returned from national duty at the end of March, they have done well on their travels but suffered three painful home defeats.
They have lost 4-1 to Brentford and 4-2 to Arsenal at home in the Premier League, as well as going down 3-1 to Real Madrid, while a 6-0 win at Southampton provided relief before Chelsea were 3-2 victors after extra time against Madrid at the Santiago Bernabeu.
That result ended Chelsea's Champions League campaign as they exited 5-4 on aggregate in the quarter-finals, but a 2-0 win at Wembley against Crystal Palace has set up an FA Cup final clash with Liverpool.
Consistency is painfully lacking, and with off-field issues an inevitable distraction as the club seeks new ownership, it is little wonder Tuchel feels a touch weary.
"I felt very tired after Real Madrid and after the turnaround: Southampton away, Real Madrid away, and another away game at Wembley," Tuchel said.
"It was tiring, and I felt it and asked myself what signals should I give."
Tuchel, whose team tackle West Ham on Sunday, said he does not "feel the same level of excitement before every match", but stressed that did not mean less effort goes into preparation.
He pointed to Chelsea's recent defensive record as an area of considerable concern.
"We have a bit of a bad mix of big individual mistakes and a bit of lack of quality in the one-on-one defensive attitude and behaviour in the box and around the box," Tuchel said.
"We get punished for it heavily. I'm not so sure I have an explanation why. The expected goals we conceded since the national break is a bit higher than normal.
"It's about tactics, high pressing, deep pressing, how chances are created, to keep the expected goals as low as possible."
Since the international break, Chelsea have conceded 13 times from an expected goals against (xGA) tally of 8.92.
This does not follow the pattern of their season as a whole. Including all competitions, they have an xGA of 61.43 but have conceded only 45 times.
Of the seven errors they have made leading to a goal in this campaign, four of those have come in the last three weeks.
"Most of the time in football it's a mixture of circumstances and bad luck, and the opponent making the very most of what we offer them," Tuchel said.
"We lack the real determination and attitude on the one-on-one in the box to maybe keep the actual goals under the expected goals."
Chelsea will put their home form up for scrutiny again as the Hammers visit this weekend. Tuchel's team have just seven wins from 15 Premier League home assignments this season, the fewest victories of all sides in the top seven.
Away from home, only Manchester City (12) have won more games than Chelsea (11) in the Premier League.
Tuchel joked that Chelsea could perhaps switch dressing rooms at home or choose another hotel before home games, if they were a superstitious team.
"I have no solution, but this is not the level we hope to produce in home games," he said. "It's a bit fragile at the moment, I have to say. It can happen that a feeling creeps in that you don't want to have in a home game.
"We have a row of three home games with very similar results that we absolutely don't like. It's now the job to convince the players to keep on going, supporters to keep on pushing, and hang on in positively. Don't get superstitious now and don't believe in things that are not there."
Slot: Guardiola contract is 'good news' for Premier League
Arne Slot believes it is "good news" for the Premier League that Pep Guardiola has signed a contract extension with Manchester City.
The Spaniard signed a two-year extension with the reigning champions and will remain in the dugout at the Etihad until 2027.
He has won 18 major trophies in his time at City, including six Premier League titles, and twice beat Jurgen Klopp's Liverpool to the top-flight crown by a single point.
Guardiola averages 2.35 points per game in the Premier League, the highest rate of any manager (20+ matches). Indeed, he is so far ahead of the next highest (Alex Ferguson's 2.16), he could lose his next 26 league games in a row and would still be top.
Slot is yet to face City since taking over from Klopp at the start of the season, with the rivals' first meeting of the season set for December 1.
"It's good news for City and for the league because everyone wants the best managers and the best players over here," Slot said when asked about Guardiola's new contract.
"He is definitely one of the best managers, maybe the best manager of the league.
"He's won four titles in a row, so it's fair to say he's maybe the best manager in the league.
"On the other hand, they have so many quality players that, if he would have made the choice to leave, I wouldn't have expected them to end up bottom of the league next season."
Other Premier League managers echoed Slot's sentiment, with Brighton boss Fabian Hurzeler, who inflicted a fourth consecutive defeat on City before the international break, saying it is the "best thing that can happen to the Premier League".
"He is one of the best coaches in the world," Hurzeler said. "With his ideas, he always brings something new to the football stage, and it is always a challenge to compete against him.
"He always adapts quickly, always has new ideas and he can always win the game. I'm very happy because we can learn from him and to compete with him is a big, big experience."
Newcastle United boss Eddie Howe added: "He's contributed so much to English football. He's revolutionised how a lot of teams play.
"I think he's incredibly talented, and it's good for the English game that he's still here.
"He will continue to develop and evolve his style, and people will potentially continue to follow that. From the competition side, I think it keeps the Premier League as the best in the world."
Vlahovic out of Juventus clash with Milan
Dusan Vlahovic will miss Juventus' trip to Milan in Serie A this weekend and is also a doubt for the Champions League game at Aston Villa, head coach Thiago Motta has confirmed.
Vlahovic returned from the international break with a muscle problem in his left thigh, and the manager, after he confirmed the Serbian's absence for Saturday's game at San Siro, was asked about his chances of playing on Wednesday at Villa Park.
"I don't know. He definitely won't be there tomorrow. We hope to have him back as soon as possible," Motta told a press conference on Friday.
"Injuries are part of football. Now it's Vlahovic's turn, but we'll keep playing with the same principles, attacking and defending together."
Vlahovic is the latest of Motta's injury problems at Juventus. Argentine winger Nicolas Gonzalez missed the last six league games and is still unavailable, while Poland striker Arkadiusz Milik is a long-term absentee.
Brazilian midfielder Douglas Luiz will also miss the game with Milan and defender Juan Cabal recently suffered an Anterior Cruciate Ligament (ACL) injury, the same issue which will keep fellow defender Gleison Bremer out for the rest of the season.
"I'm really disappointed for Cabal because, like Bremer, he'll be out for a long time," Motta said.
"This is another reason to push ourselves, to commit that bit more so that these absences don't weigh too heavily."
Juventus go into the game as the only unbeaten side in Serie A but find themselves sixth in the standings in what is so far a very tight title race, with just two points separating Motta's side from leaders Napoli.
"It's very balanced and this is good for both us and the public," Motta said.
"We must all try to continue like this. We have to try to get as many positive results as possible."
Milan are one place behind Juve but six points off Motta's side.
Vlahovic out of Juventus clash with AC Milan
Dusan Vlahovic will miss Juventus' trip to AC Milan in Serie A this weekend and is also a doubt for the Champions League game at Aston Villa, head coach Thiago Motta has confirmed.
Vlahovic returned from the international break with a muscle problem in his left thigh, and the manager, after he confirmed the Serbian's absence for Saturday's game at San Siro, was asked about his chances of playing on Wednesday at Villa Park.
"I don't know. He definitely won't be there tomorrow. We hope to have him back as soon as possible," Motta told a press conference on Friday.
"Injuries are part of football. Now it's Vlahovic's turn, but we'll keep playing with the same principles, attacking and defending together."
Vlahovic is the latest of Motta's injury problems at Juventus. Argentine winger Nicolas Gonzalez missed the last six league games and is still unavailable, while Poland striker Arkadiusz Milik is a long-term absentee.
Brazilian midfielder Douglas Luiz will also miss the game with Milan and defender Juan Cabal recently suffered an Anterior Cruciate Ligament (ACL) injury, the same issue which will keep fellow defender Gleison Bremer out for the rest of the season.
"I'm really disappointed for Cabal because, like Bremer, he'll be out for a long time," Motta said.
"This is another reason to push ourselves, to commit that bit more so that these absences don't weigh too heavily."
Juventus go into the game as the only unbeaten side in Serie A, but find themselves sixth in the standings in what is so far a very tight title race, with just two points separating Motta's side from leaders Napoli.
"It's very balanced and this is good for both us and the public," Motta said.
"We must all try to continue like this. We have to try to get as many positive results as possible."
Milan are one place behind Juve but six points off Motta's side.
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