West Ham defender James Tomkins is expecting a tough match against Derby at Pride Park on Saturday.
Tomkins, who helped the Hammers to a 1-1 draw at Birmingham City on Boxing Day, will be returning to face the club he spent eight games on loan with in 2008.
West Ham have selection issues as George McCartney, Julien Faubert, Jack Collison and Kevin Nolan all miss the Derby trip due to suspension, while Winston Reid and Abdoulaye Faye are struggling with injury.
"We have played Derby and we know what their strengths are," Tomkins told West Ham TV.
"We know what we need to do to win the game. We have a few suspensions and injuries so we have to get the lads back this week and push on from Birmingham. We are just looking to the next game now."
Dan Potts, 17, has played the last two matches at left-back and Tomkins wants others to follow the teenager's example.
"It is all about taking your chance when you get the chance with injuries," added Tomkins.
"Young Pottsy is doing that at the minute. Hopefully we can take three points at Derby and stay high up in the league. It is the last game of the year and we want to start off next year in the way we have finished this year."
West Ham beat Derby 3-1 at Upton Park earlier in the season.