West Ham United boss Sam Allardyce has revealed that James Tomkins is an injury doubt for the team's Boxing Day trip to Chelsea.

The defender suffered a hamstring problem during the Hammers' 2-0 win over Leicester City last weekend.

Meanwhile, Mark Noble is available for the match at Stamford Bridge following a spell on the sidelines.

"James Tomkins is our only concern," Allardyce told the club's official website. "Mark Noble is back in the squad, so James came off with a hamstring in the last game against Leicester and we'll know later on Christmas Day evening if he is available or not. The rest of the squad are all together over this very strenuous period and are available for selection."

West Ham are currently in fourth place in the table, while Chelsea have a three-point lead at the top of the standings.