ACCRA, Jan. 20 (Reuters) - A last-gasp goal by Sulley Muntari gave hosts Ghana a 2-1 victory in Group A over Guinea in the opening game of the African Nations Cup at the Ohene Djan stadium on Sunday.

The Portsmouth midfielder netted with less than one minute remaining with a 25-metre shot that went under Kemoko Camara's bar.

Striker Asamoah Gyan had put the Black Stars ahead 10 minutes into the second half by converting a penalty after Junior Agogo was brought down in the area by Oumar Kalabane.

But the Guinea defender made amends 10 minutes later when his header from a corner struck the crossbar and went in off keeper Richard Kingson.

Morocco take on Namibia in Group A's second game on Monday.