Chelsea dropped points for the third consecutive match after they were held to a goalless draw by AFC Bournemouth at the Vitality Stadium.
Cole Palmer started for the first time since mid-September, but his return failed to inspire the Blues, who could drop to fifth place if Crystal Palace win away at Fulham on Sunday.
Bournemouth thought they had opened the scoring just four minutes in, but Antoine Semenyo's strike was disallowed following a VAR check due to an Evanilson offside in the build-up.
A fine first-half showing by Chelsea goalkeeper Robert Sanchez kept Bournemouth at bay, before the visitors improved after the break and hit the woodwork through Alejandro Garnacho.
Neither side were able to find the much-needed winner, leaving Bournemouth in 13th place after a sixth league game without victory, and Chelsea in fourth, eight points behind league leaders Arsenal.
How the match unfolded
Chelsea were twice reprieved by offside decisions early on. Evanilson's positioning caused Semenyo's close-range finish to be disallowed, before Bournemouth's appeals for a penalty after a challenge on Justin Kluivert were cut short by the assistant referee's flag.
Evanilson should have fired Bournemouth ahead in the 35thminute, but the Brazilian's reflexes were too slow from point-blank range after Sanchez tipped away Semenyo's rasping drive.
Sanchez kept Chelsea level with back-to-back saves on the stroke of half-time against Alex Scott and Semenyo, who then teed up Marcus Tavernier to drag wide one minute into the second period.
Djordje Petrovic was finally called upon in the 49th minute to deny Pedro Neto's low piledriver, before the Portuguese winger curled in for Garnacho's stooping header to clip the post as Chelsea ramped up the pressure without reward.
Sanchez enjoyed a quieter closing half but still had to be alert late on, pushing away another fizzing Semenyo attempt from the left as neither team could find the decisive goal.
Faltering attack characterises Bournemouth struggles
Andoni Iraola's out-of-form side came flying out of the blocks as Scott's low delivery caused chaos for Semenyo's disallowed strike, before Tavernier stung Sanchez's palms from the perimeter of the area.
Kluivert went down when felled by Reece James on the rebound from Tavernier's effort, with Michael Oliver pointing to the penalty spot before quickly changing his decision to signal the Dutchman was offside.
Evanilson then sliced over inside the six-yard area with the goal at his mercy, before Scott's fierce drive and a similar attempt from Semenyo forced Sanchez into more fine work in a one-sided first half.
An unmarked Tavernier was also left to rue a rushed half-volley early into the second half, while Iraola's pain was compounded by losing Marcos Senesi to injury just past the hour.
Bournemouth seemed to slow from that point on, and only troubled Sanchez again through Semenyo, as their wait for a first win since late October continued.
Iraola will be desperate for his side to find their clinical edge ahead of their next match, away to Manchester United at Old Trafford, where they have won 3-0 on each of their last two visits.
Palmer return fails to inspire timid Chelsea
Enzo Maresca was clearly unimpressed by a drab showing in a 3-1 defeat at Leeds United on Wednesday night, with the Italian making six changes here – his most in the Premier League this season.
Fit-again Palmer started for the first time since limping off at Man Utd in September, but the England international embodied Chelsea's lack of fluidity in the opening half.
Maresca was dealt another injury blow when Liam Delap was forced off in the 31st minute, having landed awkwardly on his shoulder following a tussle with Senesi.
Meanwhile, Marc Cucurella's tame header over marked the Blues' only real chance of an underwhelming first half.
Maresca's side did improve after the interval, with Neto, Enzo Fernandez and Palmer all working Petrovic, along with Garnacho's headed chance against the post, in a flurry of second-half openings.
Garnacho then swerved another driven shot wide to Petrovic's left, while Fernandez blazed over an optimistic attempt with just minutes remaining.
Maresca will have been delighted with Sanchez's work in goal and clean sheet, but knows improvements are needed before a tough week that brings a trip to Atalanta in the UEFA Champions League and the visit of Everton to Stamford Bridge.
Club reports
Bournemouth report | Chelsea report
What the managers said
Andoni Iraola: "I think our performance was a lot better [than against Everton in midweek]. I think we played a really solid game and I think we were closer than Chelsea to winning today. Now everything is costing us a lot. The disallowed goal was [only] a little bit offside, the chance of Evanilson a little bit outside the post. But we have to keep playing like today, keep fighting. I think it was a step forward today, even if it was only one point."
Enzo Maresca: "I think we lacked a bit of quality in the last third, with the last pass, the last shot. But we have said many times that when you are not able to win, it's important that we don't lose. We take the point and we go again on Tuesday in the Champions League.
"Unfortunately Liam Delap's shoulder injury looks bad. We'll see in the next 48 hours. He was out for two months with the previous injury. Hopefully this is not as long but it looks bad. The plan for Cole Palmer was for him to play 45 minutes or one hour, and we are happy [he is back] because I think you can see that with Cole we are a better team."
Next PL fixtures
Key facts
Bournemouth are winless in six Premier League games (D2 L4), failing to score in consecutive league games under Andoni Iraola for the third time (also in September 2024 and October 2023).
Chelsea are unbeaten in four of their last five Premier League away games (W3 D1 L1), keeping four clean sheets – more shutouts than they managed in their previous 19 matches on the road in the competition (3).
Chelsea failed to score for the first time in 14 Premier League games since a 0-0 draw against Crystal Palace in August.
Chelsea made six changes to their starting XI from their previous Premier League match, their most between games this season, with their 46 changes overall being the most in the competition in 2025/26.