Goran Stevanovic expects to make changes to his team for the game against Mali on Saturday at the 2012 African Cup of Nations.Ghana won the opening Group D game 1-0 against Botswana on Tuesday but Stevanovic says he has a big squad with enough quality to choose from."You know who plays first game but never know who would play last game. I need 20 ready players for the competition. And I am sure that I have very, very good quality [players] and I believe in every player present here."Some of them, we will see," he said when asked about the possibility of making changes to the team that started the first game in the competition.Ghana's central defensive pairing would certainly see changes following John Mensah's suspension.Mensah was shown a straight red card in the game against Botswana and joins Isaac Vorsah as the only two suspended players.According to Caf, both will end their suspensions after the game with Mali.But Stevanovic is happy with the form of John Boye as he contemplates on his defensive pairing for the game in Franceville."We will see. We have enough time to the game. John Boye was man of the game. I am very satisfied with him. I gave him a chance and he justified my confidence."