 Kọ itẹsiwaju fun paragirafi yii - Isailović ṣe aṣoju FR Yugoslavia ni ipele labẹ 21, ti o gba awọn ibi-afẹde mẹrin ni awọn ifarahan marun lakoko ipolongo ikẹkọ ti ko ni aṣeyọri ti ẹgbẹ fun 1998 UEFA Under-21 Championship : ó ṣe tán. 