LONDON, Sept. 10 (Xinhua) -- Manchester City will be without forward Omar Marmoush for Sunday's Premier League derby against Manchester United after the Egyptian suffered a knee injury on international duty.

The 26-year-old was forced off just nine minutes into Egypt's World Cup qualifier against Burkina Faso in Ouagadougou on Tuesday, a game that ended goalless. He had initially continued after treatment following a heavy challenge in the fourth minute, but was later replaced by Osama Faisal.

Marmoush, who joined City from Eintracht Frankfurt for 59 million pounds in January, has scored eight goals in 28 appearances since arriving at the Etihad.

"Initial results on a scan performed in Egypt indicate he will not be available for the Manchester derby on Sunday, and he will now return to Manchester for more assessment and to begin his rehabilitation," read a Manchester City statement Wednesday.

Marmoush's absence leaves City head coach Pep Guardiola with limited attacking options. Summer signing Rayan Cherki remains sidelined with a hamstring problem, while Phil Foden also missed the defeat to Brighton prior to the international break. ■