Ex Black Stars player Yaw Preko has warned that, the Black Stars can only beat Zambia by dominating possession, being clinical in attack and avoiding playing extra time in their semi final game at the Africa Cup of Nations.According to him, the Zambian team boasts better fitness levels and finishing, considering they have scored 8 goals in four matches in the ongoing tournament.“They should possess the ball and make sure the attacking is sharp because if the game travels to extra time I’m afraid the Zambians will go through”. He told JOY SportsYaw Preko was involved in the Black Stars last Cup of Nations clash with Zambia in a 1-0 defeat in 1996.