Chelsea dropped more points in their quest to climb back up the Premier League standings as Serge Aurier earned Nottingham Forest a 1-1 draw with Graham Potter's side on Sunday.
Fresh from their first league win in six games last time out against Bournemouth, Chelsea started well in the Nottingham drizzle, with Raheem Sterling firing them into the lead in the 16th minute with his first league goal since August.
Forest improved after the break and were desperately unlucky not to equalise early in the second half as Morgan Gibbs-White's drilled half volley hit the underside of the crossbar but bounced on the goal line and away.
The hosts kept coming and deservedly levelled things up as Aurier slotted home his first goal for his new club in the 63rd minute, with Forest looking the more likely winner from there on in.
They could not complete the turnaround, however, with Chelsea hanging on for a point that leaves them eighth in the standings, seven points behind Manchester United in fourth.
The hosts remain in the relegation zone but climbed to 18th, level on 14 points with West Ham United above them.
"I think overall when the game was controlled in the first half I don't think we did well enough, our performance level wasn't good enough, didn't move the ball fast enough," Potter said.
"They use their advantages which is the environment, the crowd. The second half we didn't control it well enough."
Chelsea needed the reset that the World Cup gave them, given they had gone on their longest league run without a win, five, in 10 years prior to the tournament.
It appeared they had turned the corner after the Bournemouth win and their impressive start at the City Ground. They nearly broke the deadlock in just the second minute as Mason Mount fired over from a good position.
The visitors went one better through Sterling after Christian Pulisic's cross had looped onto the crossbar and the England forward hammered home the rebound.
Chelsea continued to remain in control until the break, with Pulisic wasting a good chance to make it two just before the interval, firing straight at home goalkeeper Dean Henderson.
Brennan Johnson saw one first half effort saved, but missed an even more gilt-edged opportunity early in the second period, firing too close to Chelsea goalkeeper Kepa Arrizabalaga from a good position.
Gibbs-White was causing Chelsea all kinds of problems, firing against the crossbar before playing a big part in Aurier's equaliser, curling over a corner the visitors could not clear and former Tottenham Hotspur full back pounced.
Chelsea substitute Pierre-Emerick Aubameyang should have done better with a late header, but it would have been harsh on the home side, who more than warranted at least a point from the contest.
Tottenham's top four hopes suffer blow
Tottenham Hotspur's hopes of regaining their place in the Premier League's top four were scuppered as they suffered a demoralising 2-0 home defeat against Aston Villa on Sunday.
Antonio Conte's lacklustre side were devoid of inspiration throughout the contest and were punished after the break by goals from Emiliano Buendia and Douglas Luiz.
Tottenham's France keeper Hugo Lloris, playing his first game since losing the World Cup final, was at fault for Buendia's 50th-minute opener. And when Luiz added a second in the 73rd minute, home fans began streaming towards the exits.
Chants against Tottenham chairman Daniel Levy rang out and it could have got worse as Villa sauntered to only a third win in their last 22 Premier League clashes with the Londoners.
Tottenham were booed off at the final whistle as defeat left them in fifth place with 30 points from 17 matches, two points behind Manchester United who have a game in hand and 13 behind local rivals and leaders Arsenal.
Villa, who claimed a third win in four league games since former Arsenal manager Unai Emery replaced Steven Gerrard in November, remain in 12th place with 21 points.
