Chelsea manager Graham Potter pleaded for time to gel his expensive collection of new stars after the Blues were held 0-0 at home by Fulham on Friday.
Enzo Fernandez made his Chelsea debut after becoming the most expensive player in British football history with a o107 million move ($132 million) from Benfica on transfer deadline day.
MykhailoMudryk was also given his Stamford Bridge bow, while Noni Madueke and David Datro Fofana came off the bench for their Premier League debuts.
Chelsea's record investment of over 300 million in the January window took the total spend on players in their first season under new ownership to over half a billion.
Co-owners Todd Boehly and BehdadEghbali were in attendance, but will not have been impressed as another chance to close on the top four slipped by.
Potter's men sit ninth in the table, still nine points adrift of the Champions League places.
"New players are adapting to a new country and a new league. It's not straightforward. When the price tag is what it is questions will be asked, it's the nature of the business," said Potter.
"The decision we took in the window you can see the profile in terms of age. We feel we have a very strong group of players. We have to gel and become a really good team. That's where the work is."
Fulham had secured a first victory in the west London derby since 2006 when the teams met just three weeks ago.
Marco Silva's men sit two points and three places above their local rivals in the table in their first season back in the top flight.