West Ham have confirmed record signing Andre Ayew is facing four months out with a thigh injury.
The winger - signed from Swansea City for £20.5million this month - had to be replaced in the first half of his debut in Monday's 2-1 Premier League defeat to Chelsea after sustaining the injury.
West Ham had previously revealed that scans had indicated Ayew, 26, would face "a significant rehabilitation period" and co-owner David Gold said on Thursday that the timeframe would be four months, with surgery required to solve the problem.
Gold wrote on Twitter: "Sad news. Ayew has injured his quadriceps and will need surgery.
"He will be out for 4 months. Good luck Andre."
Sad news. Ayew has injured his quadriceps and will need surgery. He will be out for 4 months. Good luck Andre. dg August 18, 2016
