Scottish side Hearts have hinted that Ghana midfielder Laryea Kingston is likely to be unavailable for the Black Stars two World Cup qualifiers in two weeks' time.Kingston will miss Hearts' match against Dundee United Sunday because of a recurrence of his hamstring trouble.And he is not expected to be back for the final game of the season against Celtic either.The Ghanaian midfielder had only recently been passed fit after undergoing treatment in Germany, but pulled up in the first half of his club's goalless draw with Aberdeen on Tuesday night."I can't understand it," Csaba Laszlo, the Hearts manager said."Larry is out for ten weeks, and then he's OK, but now he has the same problem."I'm sorry for Larry. He's a really good football player and if he's fit he can help any football team."Even though no tests have been done so far, there are fears that he could stay out as long as he did when he got injury the last time.He was out for nearly three months that kept him out of the World Cup qualifier against Benin in April and he is likely to miss the two matches against Mali and Sudan.Ghana are keen on getting a result in both matches to boost their chances of qualifying for the World Cup and Kingston is a key player for the Black Stars.Source: Ghanasoccernet