Black Stars coach Kwesi Appiah has dropped hints that returnees Kevin-Prince Boateng and the Ayew brothers are not be guaranteed automatic call-up places for upcoming assignments.Last week, the Ghana Football Association confirmed Kevin Boateng, who resigned two years ago stating playing for club and country had a toll on his health, had ended his self-imposed exile and ready to rejoin his international teammates.Andre and Jordan Ayew also rescinded their decisions after talks with President John Mahama at the Flagstaff house last week.Ahead of Ghana’s crucial final 2014 FIFA World Cup qualifier against Zambia in Kumasi later this year, Appiah has intimated that the announcements by the trio does not mean they will automatically be invited to the team."I always believe it is important all Ghanaian players make themselves available for selection," said coach Appiah"And is you the coach that will decide whether you need this player at a particular time and it depends on the game that you are going to play and the tactics and if they can fit in you bring them in but as to they will by all means be in does not come in."Ghana need a draw against the Chipolopolo to remain Group D leaders and progress to the play-offs.