The worst for Chelsea could be yet to come.
That's the view of Tony Cascarino following The Londoners' humbling 3-0 home defeat to Sunderland on Sunday afternoon.
Carlo Ancelotti's men faced The Black Cats without their first-choice centre-backs after injury ruled out John Terry and Alex, while the champions were also shorn of long-term absentees Frank Lampard and Yossi Benayoun, as well as the suspended Michael Essien.
The loss was Chelsea's second in three games following their 2-0 reverse to Liverpool and The Blues face two tricky away fixtures in the next couple of weeks as they head to Birmingham and Newcastle.
Talking to Sky Sports News HD, ex-Chelsea striker Cascarino says it is vital that they get some of their big guns back for those matches - because the squad isn't strong enough to cope without them.
"It could develop into a crisis, as long as injured players stay injured and players like Michael Essien get suspended," said the former Republic of Ireland frontman. "As was evident yesterday, there is a lack of depth within the Chelsea squad."
"They've got two tough away games and they'll be hopeful that they can get John Terry and Alex back. I wouldn't fancy Chelsea having to go to Newcastle and not have Alex and Terry there. Andy Carroll would be rubbing his hands together and wouldn't be able to wait for the game."
Ancelotti led Chelsea to the league and FA Cup double last term but Cascarino insists that the Italian could still be susceptible to the sack if his side to do not pick up form, while he also questioned the ex-AC Milan coach's logic in letting his assistant Ray Wilkins leave the club last week.
"Carlo Ancelotti is not safe," said Cascarino. "Jose Mourinho lost his job after achieving amazing feats at Chelsea and he lost it very early on in the season."
On Wilkins, he added: "I don't think Ray going was the reason they lost 3-0, there were a lot of other reasons that we all saw, but why would Ancelotti allow that to happen?"
Chelsea added just two senior players to their ranks during the summer - Benayoun from Liverpool and Brazilian midfielder Ramires from Benfica - with the squad being completed by a host of promising youngsters from the academy.
But Cascarino believes that following the Blues' dip, they may now decide to splash the cash, either in January or at the end of the season.
"I think (Roman) Abramovich thought he could win things without spending any money but I think he'll wake up this week and think a little bit differently," he added.
"Chelsea have become a bit like Real Madrid and there will be a serious overhaul of the squad if they don't win (the Premier League). If he (Abramovich) fails, he will look at tearing the club apart."