West Brom forward Nacer Chadli has been ruled out for up to two months with a reoccurrence of his hip injury.
The £18million record signing limped off in the 3-1 defeat at Stoke a week ago and he is unlikely to return before March.
Chadli has made just three league appearances this season because of his initial hip problem and his absence adds to Albion's problems.
They have scored just twice in six games under boss Alan Pardew, are second bottom of the Premier League and winless in 18 games ahead of Sunday's visit of Arsenal.