Black Stars midfielder Anthony Annan has described Ghana’s final group game against Guinea as the team’s biggest test in the group stage of the ongoing Africa Cup of Nations in Equatorial Guinea and Gabon.According to him, they are approaching this encounter with all seriousness since the team is aware of the threat pose by the Syla Nationale.“This game is very important, so we have to focus on winning” .He told JOY Sports“The Guinean’s are a strong side, they have good players and should not be underratedJust a draw against Guinea will secure the Black Stars top spot in Group D and set a quarter final clash with Tunisia.