Chelsea manager Carlo Ancelotti has confessed that his team is not fit for the start of the Premier League campaign.
The defending champions lost their third straight pre-season match, losing to Hamburg 2-1 on Wednesday.
Ancelotti admits that his returning World Cup stars are fighting to be fully prepared to face West Bromwich Albion in their August 14 Premier League opener.
"Some players are in good condition but others need more time,” Ancelotti told The Sun.
"The 10 players that only came back to us on July 26 need to have another two weeks of work.
"After just eight days of training it is impossible to be fit.
"We are all disappointed because we have lost three games consecutively so it's not a good start for us.
"Now we have to hope we can come back with a win against Manchester United in the Community Shield on Sunday."
Goals from Mladen Petric and Heung-Min Son in the second half, led the Bundesliga side past the Blues, who lost the previous two pre-season games to Ajax and Eintracht Frankfurt as well.
Michael Essien helped Chelsea take the lead, stealing the ball from Jonathan Pitripa and feeding Frank Lampard, who was left with a simple tap-in to make the score 1-0 for the Blues.
However, Petric took advantage of a terrible backpass from Yuri Zhirkov to score the equalizer, and with just three minutes remaining Son rounded Ricardo Carvalho and beat goalkeeper Ross Turnbull to give the German club a 2-1 victory.
Ancelotti insists that the defence must improve if Chelsea are going to repeat as Premier League champions this season.
"In the past the defence has given out a lot of confidence - but now we are losing some concentration.
"We have made mistakes and now we have to show more character.
"But even if some of our players are not fit, they still have a good presence on the pitch.
"Maybe it's not so important that Lampard and Terry are 100 per cent fit at the start of the season because they have that presence and they will do better. They just need more time playing."
The defending champions lost their third straight pre-season match, losing to Hamburg 2-1 on Wednesday.
Ancelotti admits that his returning World Cup stars are fighting to be fully prepared to face West Bromwich Albion in their August 14 Premier League opener.
"Some players are in good condition but others need more time,” Ancelotti told The Sun.
"The 10 players that only came back to us on July 26 need to have another two weeks of work.
"After just eight days of training it is impossible to be fit.
"We are all disappointed because we have lost three games consecutively so it's not a good start for us.
"Now we have to hope we can come back with a win against Manchester United in the Community Shield on Sunday."
Goals from Mladen Petric and Heung-Min Son in the second half, led the Bundesliga side past the Blues, who lost the previous two pre-season games to Ajax and Eintracht Frankfurt as well.
Michael Essien helped Chelsea take the lead, stealing the ball from Jonathan Pitripa and feeding Frank Lampard, who was left with a simple tap-in to make the score 1-0 for the Blues.
However, Petric took advantage of a terrible backpass from Yuri Zhirkov to score the equalizer, and with just three minutes remaining Son rounded Ricardo Carvalho and beat goalkeeper Ross Turnbull to give the German club a 2-1 victory.
Ancelotti insists that the defence must improve if Chelsea are going to repeat as Premier League champions this season.
"In the past the defence has given out a lot of confidence - but now we are losing some concentration.
"We have made mistakes and now we have to show more character.
"But even if some of our players are not fit, they still have a good presence on the pitch.
"Maybe it's not so important that Lampard and Terry are 100 per cent fit at the start of the season because they have that presence and they will do better. They just need more time playing."