West Ham fear James Tomkins could miss the rest of the season with a dislocated shoulder . The 25-year-old fell awkwardly in training on Thursday and left the field in considerable discomfort . He will have further scans on Friday but manager Sam Allardyce is wary the in-form centre-back will be ruled out for around 10 weeks . Allardyce only announced at lunchtime that striker Enner Valencia was out after cutting his toe on a broken tea mug . James Tomkins ( right ) could miss the rest of the season with a broken shoulder . The in-form West Ham defender suffered the injury during training and left the field in discomfort . 'West Ham can confirm that James Tomkins has suffered a dislocated shoulder , ' said a club statement . 'The 25-year-old was taken for hospital treatment and will continue to be assessed by the club 's medical staff . ' Tomkins ' news is compounded as Winston Reid has a hamstring injury and is already ruled out of the Arsenal game while Carl Jenkinson is unavailable as he ca n't play against his parent club . The likelihood is that Cheikhou Kouyate will be forced to deputise again . The likelihood is that Cheikhou Kouyate will be forced to deputise again in defence for West Ham .
James Tomkins suffered a fractured shoulder in preseason . The year - old defender could miss the rest of the season . Manager ben ##nett will rely on Cheikhou Kouyate to deputise . Winston Reid and Carl Jenkinson are also unavailable against Arsenal .