Fernando Torres, Willian and Oscar scored in the second half as Chelsea continued their fine form with a 3-0 win at Southampton.
Chelsea, who entered the match on the back of wins against Swansea City and Liverpool, flexed their attacking muscle after the break and were simply too good for Southampton, who lost back-to-back home matches for the first time under manager Mauricio Pochettino.
After an entertaining first half, Torres broke the deadlock in the 60th minute, reacting quickly to head into an open net after a deflected Eden Hazard cross beat Southampton goalkeeper Kelvin Davis and hit the post.
Chelsea did not have a striker score an away league goal in all of 2013, but on the first day of a new year, Torres broke the drought.
Willian then scored a fine curling strike from the edge of the penalty area with 19 minutes left before fellow substitute Oscar wrapped up the win with a composed left-footed effort.
Ramires returned from suspension for Chelsea in one of six changes, as the likes of Torres, Juan Mata and Andre Schurrle also came in, while Morgan Schneiderlin and Gaston Ramirez were recalled for Southampton.
Torres started brightly, going close twice in the first three minutes, while Schurrle – making his first league start since scoring twice at Stoke City last month – fired just wide.
Southampton defender Dejan Lovren clashed heads with team-mate Jose Fonte, causing play to stop, and after the former returned, Southampton grew into the match.
Adam Lallana's close-range shot was blocked by Ashley Cole and the same defender did well to deny Jay Rodriguez when Ramirez played him through with a lofted ball.
For the second time in 12 minutes, Davis was quick off his line to deny Hazard – he did excellently to keep out Ramires earlier – and Lallana was again denied inside the penalty area by an excellent block, this time from Cesar Azpilicueta.
Ramires was a constant threat and after a charging run, he forced Davis to tip his strike over the bar, while Hazard hesitated when he should have shot in an attacking move that ended with Schurrle's effort blocked.
Lovren and Fonte had efforts blocked as Chelsea failed to clear a corner two minutes into the second half, while at the other end, Oscar was booked for simulation after a minor collision with Davis.
An excellent ball from Hazard set up Oscar – recently brought on for Mata – but after trying to round Davis in the penalty area, he left a trailing leg in and threw himself to ground.
Chelsea were turning the screw and got their reward on the hour-mark thanks to Torres' quick reaction, but Southampton substitute Rickie Lambert fired a warning shot with a close-range header at Petr Cech with 25 minutes left.
Willian linked well with fellow substitute Oscar six minutes later though, and curled an excellent strike past Davis.
And Southampton's high line was punished again when Hazard's ball over the top sent Oscar through, and he finished with aplomb eight minutes from time.
|Coach: M. Pochettino|
for L. Shaw 46'
for J. Cork 61'
for S. Davis 76'
|Keeping Koeman must be Saints´ ´number one priority´ - Le Tissier|
|Pogba: I want to be better than Pele and Maradona|
|Wenger rounds on Arsenal critics|
|Platini optimistic as CAS hearing begins|
|Dembele still believes Tottenham can lift title|
|Le Saux hails ruthless Ranieri|
|Adelaide United v Western Sydney Wanderers: Heartache to end for one as quest for first championship|
|Torres tight-lipped on Atletico future|
|Martinez has no guarantees over Everton future|
|Copa Libertadores Review: Independiente stun defending champions, Tevez leads Boca|
|Bilic backs video technology|
|Olsen: Faroe Islands inspired Leicester´s title bid|
|Herrera: United don´t want Leicester to win title at Old Trafford|
|Hart out to erase painful Bernabeu memories|
|Perisic: Liverpool and Chelsea should talk to Inter|
|Allardyce doubts Palace focus ahead of Newcastle trip|
|Weah to run for president of Liberia|
|Klopp warns Villarreal Europa League tie is not over|
|Pique: Losing La Liga would be a failure|
|Villarreal were not lucky to beat Liverpool - Marcelino|
|Lucescu: Shakhtar still believe in final|
|Emery insists Sevilla not there yet|
|Toure and Mignolet confident of Liverpool turnaround|
|Appeals Committee upholds Simeone´s three-game ban|
|Klopp baffled by Liverpool defensive collapse|
|Villarreal 1 Liverpool 0: Adrian hands injury-time advantage to La Liga side|
|Shakhtar Donetsk 2 Sevilla 2: Gameiro nets late penalty to salvage draw|
|Bayern Munich v Borussia Monchengladbach: Wounded Bayern on the brink of Bundesliga glory|
|Reina lauds Atletico ´super-team´|
|AC Milan announce €89.3m loss|
|Wilshere: Injuries inevitable with my style of play|
|Atletico Madrid v Rayo Vallecano: Saul demands La Liga focus|
|Mancini feels Toure swoop is unlikely|
|Atletico a joy to watch, says Allardyce|
|Liverpool ordered to pay record tribunal fee to Burnley for Ings|
|Klaassen not interested in Napoli move|
|Borussia Dortmund v Wolfsburg: Hummels transfer request disrupts hosts´ preparation|
|Alli banned for the rest of Spurs´ season by FA|
|West Brom v West Ham: Bilic tips Pulis to put up a fight|
|Agbonlahor steps down as Aston Villa captain|
|Real Betis v Barcelona: Mixed emotions for Montoya as visitors close in on title|
|Hummels tells Dortmund he wants Bayern move|
|Matuidi out of PSG-Rennes clash|
|Newcastle United v Crystal Palace: Pardew poised for St James´ return|
|Flores reveals Watford break clause|
|England´s Jones helps Pardew keep Eagles grounded|
|Arsenal v Norwich City: Under-fire Wenger buoyed by easing injury woes|
|Forster: Chelsea rumours a compliment|
|Lambert to leave Blackburn|
|Sakho provisionally suspended by UEFA|
|Stoke City v Sunderland: Allardyce wary of wounded Potters|
|Falcao: USA can win Copa America|
|Madrid confirm Benzema hamstring strain|
|Everton v AFC Bournemouth: Martinez wants repeat of Wembley second-half|
|Fabregas wants title challenge under Conte|
|The pressure got to me at Tottenham, reveals Soldado|
|Bilic has no concerns over Cresswell future|
|Bilic: I might have to be a Manchester United fan!|
|Real Sociedad v Real Madrid: Carvajal hoping to cope without Benzema and Ronaldo|
|Martinez: Judge me over three seasons, not two or three months|
|Unhappy Muller accepts being dropped for Atletico clash|
|Cattermole crucial to Sunderland relegation fight - Allardyce|
|Leicester success not a one-off - Mandaric|
|There cannot be two coaches of Inter - Mancini|
|Guardiola: Don´t compare Saul to Messi|
|MLS Review: NYC stumble again, Timbers hold Revolution|
|America 2 Tigres UANL 1 (4-1 agg): Arroyo, Martinez seal win|
|Copa Libertadores Review: Rosario claim away advantage, Corinthians hold Nacional|
|PSG prospect Edouard signs first professional contract|
|Gap between Juventus and Milan is ´embarrassing´ - Sacchi|
|Mancini: I made some errors this season|
|Schlupp: Leicester are playing to win the title|
|Leicester showing nothing is impossible - Del Piero|
|Zidane does not like James, claims Valderrama|
|Pressure on ´legendary´ Liverpool - Marcelino|
|Madrid clash ´career-defining´ - Kompany|
|Neuer: We have to be awake in Munich|
|Moreno: I´m at my best thanks to Klopp|
|Bale: City are elite but Madrid more mature|
|We showed we belong - Oblak|
|Torres: This is for the Atletico supporters|
|Alonso: It could have been worse but Bayern still believe|
|Simeone praises ´best´ Atletico after Bayern triumph|
|Guardiola blames slow start for Bayern loss|
|Saul hails most important and beautiful goal of his career|
|Filipe Luis lauds Atletico match-winner Saul|
|Chelsea down City for third straight FA Youth Cup|
|Atletico Madrid 1 Bayern Munich 0: No joy for Pep as Saul answers the call|
|Lille 0 Angers 0: Coupe de la Ligue finalists frustrated in stalemate|
|Lucescu plays down Konoplyanka factor|
|Experience can count for nothing, Klopp warns Liverpool|
|Sevilla are ready to make history - Emery|
|Klopp delight for Hillsborough families|
|Cosmos boss claim contact with Totti|
|Paris Saint-Germain v Rennes: Pastore insists champions remain motivated|
|Ronaldo will be ´80 per cent´ fit... according to his mother|
|Europa League a ´dream´ for Villarreal and Soldado|
|Ozil: Third place will mean Arsenal have achieved target|
|The Bendtner experiment was a failure - Allofs|
|Infantino wants friendly between North and South Korea|
|´The worst cash out decision in history´ - Leicester backer bailed on 5000/1 bet - for 95p!|
|Sakho will not contest doping offence, but has Euro 2016 lifeline|
|Ibrahimovic, Di Maria, Ben Arfa up for Ligue 1 award|
|Simeone banned for rest of Liga season|
|Cazorla open to Villarreal return|
|RB Leipzig rejected Vardy for being ´too old´ at 27|
|Villa: Griezmann at Messi and Ronaldo´s level|
|ICC chief dreams of hosting Old Firm derby at Wembley|
|Evra: Allegri has no time for idiots|
|Beckenbauer backs Hoeness to step in for Sammer at Bayern|
|Benzema is France´s best striker - Sagna|
|Guardiola: Bayern success hinges on Champions League|
|´Never give up and be positive´ - Ronaldo rallies Madrid team-mates|
|Hart performance was ´Schmeichel-esque´ - Ferdinand|
|Benitez relieved for Hillsborough families|
|It´s hard without Ronaldo - Kroos|
|Former Inter midfielder Mariga banned for five games for injuring referee|
|Nichols free to play grand final|
|Copa Libertadores Review: Mosquera gives Tachira advantage, Nacional hold Huracan|
|Sampaoli: I almost joined Chelsea|
|Leicester´s triumph unbelievable, but deserved - Fletcher|
|Szczesny wants Roma stay|
|Torres: Nothing would compare to winning a title with Atleti|
|Ramos satisfied with 0-0 draw|
|Filipe Luis: Leicester are like Atletico|
|Ronaldo is not a child - Casemiro|
|Lewandowski: Maybe I will play in England or Spain|
|There are ´a million´ more disappointing results than 0-0 - Kompany|
|Leicester don´t need Vardy to win title at United, says Simpson|
|Dalglish: Families deserve Hillsborough verdict|
|Moving Southampton game impossible - Pellegrini|
|Tavecchio coy on Conte replacement|
|Pellegrini accuses Madrid of lacking intent in stalemate|
|Bale pleased with Madrid display|
|Ronaldo, Benzema doubtful for second leg against City|