Jose Mourinho's side prevailed 2-0, with first-half goals from Diego Costa and Eden Hazard. Costa, who was not called up for Spain's...
Costa, who was not called up for Spain's last two games so he could rest, netted his 11th goal in 10 matches in the 11th minute.
Oscar passed to Costa and the former Atletico Madrid striker hit a right-footed shot from middle of the box into the left corner of the goal.
The second goal came after a Chelsea corner.
Cesc Fabregas, who started despite being an uncertainty for the game because of a hamstring problem, set up Hazard and he drove a left-footed shot from the six-yard box into the left corner of the goal for the Blues' second.
Just four minutes later and West Brom's challenge became more difficult when Claudio Yacob was shown a red card.
The victory put Chelsea on 35 points - 10 clear of
Manchester City climbed into second place on 27 points after coming from behind to defeat Swansea at the Etihad Stadium.
He scored from the centre of the box after chesting down Nathan Dyer's pass before finishing neatly.
The goal was the first ever scored by Swansea at the Etihad.
Jesus Navas set up Jovetic, who drilled a right-footed shot from close range past goalkeeper Lukasz Fabianski.
After Gael Clichy hit the bar for the home side, Fernandinho back-heeled the ball into the path of Yaya Toure in the 62nd minute and he smashed it in for the winner.
The victory was just what Manuel Pellegrini's squad needed ahead of their Champion League clash with Bayern Munich on Tuesday.
Newcastle won for the fifth straight game and leapfrogged Swansea and West Ham into fourth place in the Premier League table after getting a 78th minute goal from Moussa Sissoko against QPR.
The Magpies, in the lower echelons of the standings in the first couple of months, are now flying high while QPR are now at the bottom of the table with just eight points from 12 games.
Manchester United hit Arsenal on the break at the Emirates to earn a 2-1 win - their first away victory of the season.
Arsenal dominated for the majority of the game but fell behind in the second half thanks to an unfortunate own goal from Kieran Gibbs.
Wayne Rooney seemed to have put the game beyond the hosts when he capped off a swift breakaway to score late on.
Substitute Olivier Giroud set up a tense few moments when he pulled a goal back in stoppage time but United held out to claim a second successive Premier League win.
Full Results
Chelsea 2 West Brom 0
Everton 2 West Ham 1
Leicester 0 Sunderland 0
Manchester City 2 Swansea 1
Newcastle 1 QPR 0
Stoke 1 Burnley 2
Arsenal dominated for the majority of the game but fell behind in the second half thanks to an unfortunate own goal from Kieran Gibbs.
Wayne Rooney seemed to have put the game beyond the hosts when he capped off a swift breakaway to score late on.
Substitute Olivier Giroud set up a tense few moments when he pulled a goal back in stoppage time but United held out to claim a second successive Premier League win.
Full Results
Chelsea 2 West Brom 0
Everton 2 West Ham 1
Leicester 0 Sunderland 0
Manchester City 2 Swansea 1
Newcastle 1 QPR 0
Stoke 1 Burnley 2