“With some few days before the start of the competition in Equatorial Guinea, Grant has decided to protect his players from likely injuries.”
Gyan will be making his Nations Cup appearance in Equatorial Guinea where two years ago, a semi-final penalty miss against eventual winners Zambia led to massive verbal abuse on social media which pushed him to take a temporary break from international football.
Two other players, Frank Acheampong and Emmanuel Agyemang Badu, also suffered knocks in training and are not 100% fit.
Ghana will depart for their tournament camp base, Mongomo, on Wednesday ahead of their Group C opener against Senegal on 19 January.
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