West Ham's European ambitions have taken a blow, with Lukasz Fabianski ruled out until December at the earliest.
West Ham goalkeeper Lukasz Fabianski is set to miss at least two months with a torn hip muscle, Omnisport understands.
The Poland international suffered the injury taking a goal-kick during the first half of his side's 2-2 draw with Bournemouth at the Vitality Stadium on Saturday.
Back-up keeper Roberto replaced Fabianski in the 34th minute and is set for a prolonged run in the starting XI.
The 33-year-old Spaniard had spells with Atletico Madrid, Benfica, Real Zaragoza and Olympiacos prior to joining West Ham on a free transfer in May.
Manuel Pellegrini's men have gone six games unbeaten in the Premier League since a 5-0 loss to Manchester City on the opening weekend.
They have six matches scheduled before December, including trips to Everton and Burnley.