Chelsea slumped to another shock home defeat, losing 0-2 to Southampton on Boxing Day.
The London team succumbed to goals from Michael Obafemi and Nathan Redmond at Stamford Bridge as they struggled to break down a stubborn defensive opponent in Southampton.
Southampton boss, Ralph Hasenhuttl, rested in-form talisman Danny Ings, but that decision paid off as his replacement Michael Obafemi scored just his second Premier League goal with a calm finish into the top corner on the counter-attack.
The introduction of attacking midfielder Mason Mount for defender Kurt Zouma at the break threatened to inject energy into Frank Lampard’s side but only a vital Fikayo Tomori intervention prevented the away side a second.
The visitors, however, struck again to seal all three points 17 minutes from time when Nathan Redmond prodded past the onrushing Kepa Arrizabalaga at the end of a fine team move.
This defeat means Chelsea have now lost five of their last seven league games and their display was in keeping with such form.
The Blues have now lost to West Ham, Bournemouth and the Saints in their last four home league games.
Elsewhere, Mikel Arteta began his reign as Arsenal Head Coach with a 1-1 draw at Bournemouth.
Despite a bright start from the visitors, Arsenal was a goal down after Dan Gosling put Bournemouth in front on the half-hour mark.
Pierre-Emerick Aubameyang, the Gunner’s captain, once again rode to his side’s rescue to level the score in the 63rd minute.
But the Gunners could not make the most of their dominance of the ball after the break against a Bournemouth side that had lost six of their last seven games.
Arteta recalled the experienced trio of Mesut Ozil, Alexandre Lacazette and Sokratis Papastathopoulos from the side that drew 0-0 at Everton.
A point leaves Arsenal still down in 11th and with one win in their last 14 games in all competitions under three different managers.
In the day’s early kickoff, Tottenham Hotspur came back from a goal down to defeat Brighton and Hove Albion 2-1 at the Tottenham Stadium.
Adam Webster had given Brighton a richly deserved lead, heading in from Pascal Gross’ right-wing delivery towards the end of the first half.
However, Spurs, who played at a pedestrian pace during the first period, raised their tempo after the interval to fight back.
Captain Harry Kane levelled matters with a right-foot shot into the bottom left corner after Brighton goalkeeper, Mat Ryan, had brilliantly parried his first effort.
Midfielder Dele Alli’s sublime lobbed finish found the top left corner to complete the turnaround for the North London team.
Carlo Ancelotti made a winning start as Everton manager as his side edged past Burnley 1-0 at a packed Goodison Park.
Burnley, after two successive wins, nearly scored inside three minutes but Jay Rodriguez’s header was cleared off the line by Yerry Mina.
Away goalkeeper, Nick Pope, did excellently to keep out Mason Holgate’s close-range shot and also a later effort from Djibril Sidibe.
But the hosts finally broke the Clarets’ brave resistance when Dominic Calvert-Lewin produced an excellent diving header, which went in off the inside of the post, from Sidibe’s cross.
The win extends Everton’s unbeaten league run to five matches and takes them up to 13th, one place below Burnley.
Premier League Boxing Day Results
Tottenham 2-1 Brighton
Aston Villa 1-0 Norwich
Bournemouth 1-1 Arsenal
Chelsea 0-2 Southampton
Crystal Palace 2-1 West Ham
Everton 1-0 Burnley
Sheffield United 1-1 Watford