Beşiktaş striker Demba Ba is expected to miss the Süper Lig game against Konyaspor next week.
The Senegalese international missed the Gaziantepspor game with a broken toe.
Ba recovered in time to play the last 10 minutes of the Black Eagles 3-1 win over Akhisar but aggravated his injury.
The power striker is now expected to miss the Konyaspor game or make a late appearance.
Slaven Bilic has been without several key players over the last few weeks due to injury.
Second choice striker Mustafa Pektemek is also out injured as well as experienced centre-back Tomas Sivok.
The Black Eagles could also be without midfielder Veli Kavlak and fullback Ramon Motta.
Beşiktaş are currently first in the Süper Lig with 31 points from 14 games.
Konyyaspor are in 12th place but have lost both of their last two games by a 5-0 scoreline.