However, he failed in Serbia. During that time, on 4 July the supporters of Musa caught the Serbian Prince in Filipolje. Vuk Lazarević, after the deliberation of his fate was executed, Lazar Branković was still left in life for a few days. Musa attempted to blackmail Đurađ Branković to move to his side for the upcoming battle (of Adrianople, 11 July). He refused, and actively participated in the victory of Süleyman, so Musa had Lazar executed. Soon after that, Stefan returned to the country and took control of it in its entirety, including the southern parts that were ruled by his brother, Prince Vuk.