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Chelsea lost ground on leaders Manchester City following a goalless draw with Wolverhampton Wanderers at Molineux.
Wolves were on top in the first half but could not find a breakthrough goal.
Daniel Podence tapped in at the far post on 16 minutes but the goal was ruled out as Raul Jimenez was offside. Edouard Mendy then saved Leander Dendoncker's close-range header before half-time.
Chelsea controlled possession for most of the second half but were left frustrated by the hosts.
Mason Mount was unable to stretch his scoring run to five matches as his shot from distance was blocked.
Jose Sa produced a big save to deny Christian Pulisic late on, getting a strong hand to thwart the American.
Consecutive draws mean Chelsea stay in third but they are now six points behind Man City. Wolves stay eighth with 25 points, three behind West Ham United in fifth.
See: Wolves report | Chelsea report
Next fixtures
Wolves 26 Dec v Watford (H)
Chelsea: 26 Dec v Villa (A)
Match officials
Referee: David Coote. Assistants: Stuart Burt, Nick Hopton. Fourth official: Andy Madley. VAR: Kevin Friend. Assistant VAR: Simon Beck.
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