Ex-Ghana winger Yaw Preko says U20 striker Kwame Nsor and Richmond Boakye Yiadom will be world-class players for the Black Stars in future.Preko, who is the assistant coach for the Black Satellites, has observed the two players at first hand at the ongoing Africa Youth Championship in South Africa.Nsor, the lanky striker known as the Adebayor of Ghana, plays for French side Metz after moving from local side Mighty Jets.Yiadom, who plays for Genoa in the Italian Serie A, has already been noted as one of the most talented players of his generation.Preko told Kickoff that the two players will excel if they continue to work hard.“Our two strikers (Kwame Nsor and Richmond Boakye Yiadom) have what it takes to get far,” Preko said“They just have to show it because if you don’t show it on the pitch when you are needed, it doesn’t do much for how good you are.”The two players are key for the current Black Satellites squad.Source: Kickoff.com