Frank Lampard says his Chelsea players may be suffering from fatigue after Wolves came from behind to beat the Blues with an added-time winner.
Pedro Neto’s 95th-minute strike gave the hosts a dramatic victory at Molineux and stopped Lampard’s side going top of the Premier League.
Daniel Podence had equalised in the second half after Olivier Giroud put the Blues ahead.
The Portugal forward tiptoed through the Chelsea defence before wrong-footing goalkeeper Edouard Mendy with a shot that deflected in off Reece James.
It came after a fierce Giroud volley from Ben Chilwell’s cross crept through Rui Patricio’s gloves to open the scoring for the visitors.
Neto was denied a late penalty for the hosts after referee Stuart Attwell reviewed his original decision on the pitch-side monitor and judged the Wolves forward was not fouled by James.
But the 20-year-old broke away in the 95th minute and fired a low strike into the far corner beyond Mendy to earn Wolves only their second win in six games.
It is a second successive defeat for Chelsea after they were beaten at Everton on Saturday, another game in which they could have gone top of the table.
“There could be some fatigue,” said Lampard, whose side have already played five games in December.
“I hate to say it after a defeat because it feels like an excuse but even in the first 60 minutes when we were the better team, we didn’t have a zip about us.
“We’ve travelled up to Everton, came back and then travelled to Wolves but everyone is in the same boat.
“We have a couple of injuries in areas which means I can’t make too many changes so I understand that side of it.”