He has won his last 7 fights but this was not one of his best .
The 22 - year - old WBO Youth champion lost on a kayo in his fourth pro fight against still unbeaten Swede Oscar Ahlin .
champion has won champion 's last 7 fights but this was not one of his best .
The 22 - year - old WBO Youth champion lost on a kayo in his fourth pro fight against still unbeaten Swede Oscar Ahlin .