Chelsea attacker Kai Havertz says the club's new players have failed to settle.
Havertz was speaking before last night's defeat at Arsenal, their sixth in a row under caretaker manager Frank Lampard.
He told Kicker: "We had a good spell under Graham Potter, but after the World Cup finals we didn't play well and we dropped a lot of points.
"Lots of new players came in during the winter transfer window, and we now have a gigantic squad.
"But they first need to feel comfortable at the club before they can show their qualities.
"It is easy to find excuses. I am no fan of putting all the blame on to others.
"In the end we are all professional footballers, and we just need to win a game."