Chelsea boss Rafael Benitez is expected to make some changes from the starting XI which beat Steaua Bucharest on Thursday, but club captain John Terry is likely to keep his place ahead of Gary Cahill.Bet: Frank Lampard is set to come straight back into the side, while Victor Moses is also pushing for a recall. Up front, Fernando Torres could get an opportunity to get on a goalscoring run after netting in the Europa League, with Demba Ba having to settle for a place on the bench. Long-term absentee Oriol Romeu (knee) remains sidelined.
As for the visitors, Sam Allardyce will be looking to build on their 1-0 win at Stoke in their previous match. Ricardo Vaz Te may get a starting berth with the away side looking for extra pace going forward.
On loan Liverpool forward Andy Carroll will again lead the line. Joe Cole (hamstring) is set to miss out on facing his former side, while George McCartney (knee) and Kevin Nolan (ankle) are also sidelined.
Chelsea's Fernando Torres (pictured right), scored only his second goal of 2013 against Steaua in the Europa League on Thursday. The other one was in the FA Cup against Brentford.
The Blues have the joint-second best scoring record in the Premier League along with Liverpool - with 56 goals. Only Manchester United (68) have netted more.
The meeting between the two teams earlier in the season finished in a 3-1 West Ham win. Mata gave the Blues an early lead before second half goals from Carlton Cole, Mohammed Diame and Modibo Maiga.
The Hammers are the joint-lowest scorers away from home in the league along with Stoke City - they’ve both scored 9 goals.
West Ham have only won two of their last eight games in the league - 1-0 wins against Swansea City and Stoke.