The 23-year-old is set to be on the sidelines after sustaining an injury during pre-season training
Ghana defender Nicholas is set to spend a long time in the treatment room after sustaining an injury on his return to pre-season training with club side Amiens.
The centre-back was diagnosed with a cruciate ligament rapture of the knee in France on Tuesday.
He will miss the start of the season, amid reports he will only return to action after the turn of the New Year.