Chelsea moved back to the top of the Premier League

Diego Costa has scored with six of his past nine shots on target in the league

Chelsea made it nine successive league wins as Diego Costa scored the winner against a stubborn West Brom at Stamford Bridge.

The Spain striker took advantage of a mistake by a hesitant Gareth McAuley in the 76th minute to rob the defender of possession and curl a brilliant left-foot

shot past Ben Foster. West Brom had looked like earning a point after restricting the Blues to just one other shot on target, a 30-yard David Luiz free-kick. Chelsea also came close through an N'Golo Kante shot that deflected off Pedro and rolled just wide of the post.

The Baggies had early chances through a Chris Brunt shot that fizzed wide and Salomon Rondon shooting across goal. Chelsea move three points ahead of Arsenal while West Brom stay ninth.

Gareth McAuley had the opportunity to clear before Costa forced him off the ball

Chelsea had scored 22 in their previous eight league victories but looked likely falling victim to a defensive masterclass from Tony Pulis' side until Costa struck. The Blues had been frustrated by West Brom's compact defence, which hurried and hassled them from the start and pressed high up the pitch, restricting them to speculative shots from long range until McAuley's error.

The 37-year-old Northern Irishman, who had been booked, had plenty of time to clear a hopeful Cesc Fabregas pass down the line but delayed fatally, allowing Costa to force him off the ball and run inside. It was the 28-year-old's 12th league goal of the season, matching last season's total.

It was very congested in the middle of the park, as both teams' average positions show (West Brom below)

West Brom had won three of their previous four league games, drawing the other, and if they had been able to hold out for another 14 minutes another point would have lifted them into sixth position. Craig Dawson and Jonny Evans led a superb defensive display, allowing Eden Hazard and Pedro little space in which to roam and spread the play. The Baggies had failed to win at Stamford Bridge in the league since September 1978 but began the brighter, with Brunt heading over before his 25-yard shot.

As the game continued their ambition was largely restricted to keeping Chelsea out but they were doing that comfortably until McAuley took the wrong option when he should have belted the ball into row Z. Dawson picked up his fifth booking of the season for pulling back Costa off the ball and will now miss Wednesday's home game against Swansea.

As It Stands

		Team	P	GD	Pts
1		Chelsea	15	22	37
2		Arsenal	15	21	34
3		Liverpool	15	16	30
4		Man City	15	13	30
5		Tottenham	15	13	27
6		Man Utd	15	4	24
7		Watford	15	-5	21
8		West Brom	15	2	20
9		Everton	15	0	20
10		Southampton	15	-1	20
11		Stoke	15	-5	19
12		Bournemouth	15	-4	18
13		Burnley	15	-10	17
14		Leicester	15	-5	16
15		Crystal Palace	15	-2	15
16		Middlesbrough	15	-3	15
17		West Ham	15	-13	15
18		Swansea	15	-12	12
19		Hull	15	-18	12
20		Sunderland	15	-13	11