Tomkins dislocated his shoulder in training last week and reports suggested that the defender would play no further part in the campaign, but West Ham remain hopeful he will feature in the run-in.
"James Tomkins underwent successful surgery on his dislocated shoulder on Wednesday and will now commence his rehabilitation, with a view to him returning to fitness before the end of the season," read a statement from Stijn Vandenbroucke, the club's head of medical and sports science, on West Ham's official website.
West Ham also confirmed that Carlton Cole will be fit to face Sunderland on Saturday after a near month-long lay-off with a hamstring injury.
Enner Valencia's toe injury means he remains sidelined until after the international break, while Winston Reid is nearing a comeback from his hamstring complaint suffered against Chelsea on March 4.
‘He instantly popped into our ratings as one of the best U21 midfielders in Europe. The impressive thing is Slot has made him into more of a no.6' Inside Ryan Gravenberch's transformation at Liverpool
‘I don’t think Liverpool would look at Ollie Watkins, a striker isn’t a pressing issue for them – it’s Arsenal who need one’ Former Reds star explains why his old club don’t need an out-and-out forward this summer
