Kevin-Prince Boateng could have done enough to secure himself a starting role for Ghana in their World Cup opener against Serbia.[LNB] With injury doubts over Sulley Muntari persisting, Black Stars coach Milovan Rajevac is looking for alternatives in midfield, and came away impressed by Boateng's first international appearance in the warm-up game against Latvia on Saturday. [LNB]"It was his first game and he played in an unfamiliar role for him, but he handled it quite well. It is the role I want to give him but for a first game with Ghana he did well," the Black Stars coach said.[LNB]The 23-year-old Portsmouth star started the match alongside Anthony Annan in the centre of the park before eventually being substituted in the 66th minute.[LNB]And that could be how Ghana line up against Serbia, with Muntari still highly doubtful and Michael Essien already lost to injury.[LNB]Muntari aggravated a thigh strain in the friendly against Holland on Tuesday and did not feature yesterday.[LNB]Ghana will also face Australia and Germany after opening against Serbia in Group D.