Ghana's assistant Coach, Maxwell Konadu says the Black Stars are yet to play their best game despite the close urge to the last eight.Ghana has amassed four points from a possible six and sit at the apex of the four- team table, but the former Asante Kotoko trainer consider the team as a work in progress.“We have not played our best game yet. The boys keep showing that they can still improve.”Konadu said in Port Elizabeth on Friday that the Stars will lose no sleep over which opposition they face beyond the first round at the plum competition that runs till February 10.“We want to top our group and stay here because the boys are getting used to the environment and the stadium. We cannot control what happens in another group.“Whoever qualifies and come here to face us, it will be okay because we are ready for all.”On his thoughts on the Stars next opponents for Monday, the coach rated Niger as a very tactically disciplined side that rallies well whenever they are out of possession.He said the psychologist is working on the psyche of the players, in the technical team's quest to eschew complacency in the game they must win to automate their stay on top of the log.Ghana's next opponent will come from Group A which comprises host, South Africa, Angola, Morocco and debutants, Cape Verde, in the event they advance to the last eight.