West Ham and Senegal striker Diafra Sakho will miss the 2017 Africa Cup of Nations after being ruled out for up to eight more weeks with a back injury.
The Hammers said on 30 November the 26-year-old would be missing for six weeks because of a thigh injury, meaning he would not return until mid-January.
But boss Slaven Bilic said on Thursday that Sakho faced up to eight more weeks out, taking him to mid-February.
The 2017 Africa Cup of Nations starts on 14 January.
In only his second appearance of an injury-plagued season, Sakho scored in a 1-1 draw at Manchester United on 27 November.