Black Satellites striker Mahatma Otoo has told Joy Sports he is not disappointed about his return to Hearts of Oak after Esperance failed to reach an agreement to sign the player on a permanent deal.The 18-year-old who was named best player in the Ghana Premier League last season has scored a goal in his previous two appearances for the Tunisian club.Despite his impressive performance at the Tunisian club, he will return to Hearts of Oak after his loan deal expires on December 31.Mahatma Otoo believes improving his performance at the club level could also earn him a call up to the Black Stars.Source: Joy Sports