Match ends, Swansea City 0, Chelsea 5.
Swansea City 0-5 Chelsea
- Oscar and Costa both score twice in first half
- Schurrle adds fifth in second half
- Chelsea open five-point gap at top
- Swansea's heaviest defeat of the season
Chelsea extended their lead over Manchester City at the top of the Premier League to five points after hammering an abject Swansea City.
The visitors led after just 50 seconds thanks to Oscar's 18-yard strike, before Diego Costa scored twice in 15 first-half minutes.
Oscar completed his brace moments later and Andre Schurrle finished the rout in the second half.
Swansea, who stay in ninth place, are now winless in four league games.
The result was manager Garry Monk's worst since taking over in February 2014 as the Welsh side capitulated to their heaviest home defeat since being promoted to the Premier League in 2011.
It was also the Swans first game since top scorer Wilfried Bony left for Manchester City.
And worryingly for them, their new Portuguese forward Nelson Oliveira proved almost anonymous on his first start in the Premier League since joining on loan from Benfica.
Chelsea now have 52 points from 22 games - although they will see their lead cut to two points on Sunday if Manchester City beat visitors Arsenal.
Jose Mourinho has endured a difficult week as he contests a Football Association charge for misconduct, but the Blues boss had no problems in Swansea and afterwards described his side's performance as the "perfect game".
His team quickly opened the scoring with midfielder Oscar pouncing on a wayward pass by Swansea's Gylfi Sigurdsson to fire a 20-yard shot past Lukasz Fabianski.
Sigurdsson nearly made amends straight away when his rasping shot from the edge of the area struck Petr Cech's right-hand post.
But the visitors were full of confidence and took a stranglehold in midfield, as Oscar, Costa and Willian found plenty of space behind Swansea's midfield.
Costa, who scored a hat-trick in September's reverse fixture, rounded off a wonderful team move after 20 minutes, collecting Cesc Fabregas's cute pass to fire past Fabianski from inside the penalty area.
Things soon got worse for Monk's side as defender Federico Fernandez gifted Costa his second on the half-hour mark.
The Argentine's attempted back-pass to Fabianski was picked off by the Spanish striker, who calmly slotted the ball past the Polish goalkeeper.
Brazilian playmaker Oscar completed his brace a minute later when he found space in the Swansea box to shoot into the top corner.
Oscar, 23, came agonisingly close to completing his hat-trick in the second half, but his shot flew narrowly wide of the right-hand post after Hazard had dispossessed Marvin Emnes.
But Chelsea capped their afternoon with a fine team goal when substitute Schurrle tapped home from Branislav Ivanovic's cut-back.
Swansea, who did not have a shot on target in the whole game, are now without a league win since the Boxing Day victory against Aston Villa.
- 12DyerSubstituted forBarrowat 75'minutes
- 17OliveiraSubstituted forFultonat 66'minutes
- 15RoutledgeSubstituted forEmnesat 32'minutes
- 3Filipe Luis
- 4FàbregasSubstituted forRamiresat 74'minutes
- 22WillianSubstituted forSchürrleat 76'minutes
- 10E Hazard
- 19Diego CostaSubstituted forRemyat 75'minutes
- Jonathan Moss
- Shots on Target
Second Half ends, Swansea City 0, Chelsea 5.
Attempt saved. Ramires (Chelsea) right footed shot from outside the box is saved in the centre of the goal. Assisted by Eden Hazard.
Foul by John Terry (Chelsea).
Bafétimbi Gomis (Swansea City) wins a free kick on the right wing.
Attempt missed. Branislav Ivanovic (Chelsea) header from the right side of the box is too high. Assisted by André Schürrle with a cross.
Attempt saved. Loïc Remy (Chelsea) right footed shot from outside the box is saved in the bottom right corner. Assisted by Oscar.
Filipe Luis (Chelsea) wins a free kick on the left wing.
Foul by Dwight Tiendalli (Swansea City).
Offside, Chelsea. Petr Cech tries a through ball, but Loïc Remy is caught offside.
Attempt blocked. Gylfi Sigurdsson (Swansea City) right footed shot from outside the box is blocked. Assisted by Marvin Emnes.
Goal! Swansea City 0, Chelsea 5. André Schürrle (Chelsea) right footed shot from very close range to the centre of the goal. Assisted by Branislav Ivanovic.
Attempt missed. Oscar (Chelsea) right footed shot from outside the box is close, but misses to the left. Assisted by Eden Hazard.
Substitution, Chelsea. André Schürrle replaces Willian.
Attempt missed. Neil Taylor (Swansea City) right footed shot from outside the box is high and wide to the right. Assisted by Gylfi Sigurdsson.
Foul by Filipe Luis (Chelsea).
Modou Barrow (Swansea City) wins a free kick in the defensive half.
Substitution, Swansea City. Modou Barrow replaces Nathan Dyer.
Substitution, Chelsea. Loïc Remy replaces Diego Costa.
Substitution, Chelsea. Ramires replaces Cesc Fàbregas.
Corner, Chelsea. Conceded by Lukasz Fabianski.
Attempt saved. Eden Hazard (Chelsea) left footed shot from outside the box is saved in the top right corner. Assisted by Nemanja Matic.
Branislav Ivanovic (Chelsea) wins a free kick in the defensive half.
Foul by Marvin Emnes (Swansea City).
Foul by Filipe Luis (Chelsea).
Nathan Dyer (Swansea City) wins a free kick in the defensive half.
Foul by Willian (Chelsea).
Dwight Tiendalli (Swansea City) wins a free kick in the defensive half.
Substitution, Swansea City. Jay Fulton replaces Nélson Oliveira.
Attempt missed. Nélson Oliveira (Swansea City) left footed shot from outside the box misses to the left. Assisted by Dwight Tiendalli.
Delay over. They are ready to continue.
Delay in match Ashley Williams (Swansea City) because of an injury.
Attempt missed. Nélson Oliveira (Swansea City) right footed shot from outside the box misses to the left. Assisted by Bafétimbi Gomis.
Foul by Nemanja Matic (Chelsea).
Bafétimbi Gomis (Swansea City) wins a free kick in the attacking half.
Attempt saved. Cesc Fàbregas (Chelsea) right footed shot from the centre of the box is saved in the centre of the goal. Assisted by Eden Hazard.
Eden Hazard (Chelsea) wins a free kick in the defensive half.
Foul by Federico Fernández (Swansea City).
Foul by Gary Cahill (Chelsea).
Nélson Oliveira (Swansea City) wins a free kick in the attacking half.