West Ham United centre-back James Tomkins reportedly dislocated his shoulder in training yesterday.

The defender has been a regular starter for manager Sam Allardyce this season, but it appears that he has joined fellow centre-back Winston Reid on the injury list.

The Telegraph says that Tomkins will have a scan today, but he could miss the rest of the season.

Allardyce is now facing a shortage of defenders for tomorrow's trip to Arsenal, as Carl Jenkinson is unable to play against his parent club.

West Ham haven't won a game in two months.