article_snippet: The 25-year-old, who recently signed a new, long-term contract with the Hammers, sustained the injury during a training session last week.
article_snippet: Stijn Vandenbroucke, West Ham head of medical and sports science, suggests The Hammers defender is again unlikely to be available when Sunderland visit this weekend, while also confirming Tomkins and young defender Doneil Henry have gone under the knife . '
article_snippet: Doneil Henry injured Doneil Henry hamstring during Doneil Henry loan spell with Blackburn Rovers and, after consulting with a specialist, Doneil Henry will have an operation at the end of the week. '
article_snippet: The trio form part of an injury list which still includes forwards Andy Carroll and Enner Valencia.
article_snippet: Andy Carroll's rehabilitation is going well, says Vandenbroucke, and the England forward 'no longer needs crutches to walk and now only has a brace on the knee'.
article_snippet: Enner Valencia is on schedule to return after the international break after cutting his toe on a broken mug, while fellow forward Carlton Cole is back in contention after recovering from the hamstring injury sustained at Tottenham last month.
highlights_snippet: The Hammers defender has had surgery on dislocated shoulder sustained in a training session last week .
  
highlights_snippet: 25-year-old hopes to be back in action by the end of the season .
  