sentences:  Tatsuyoshi challenged the WBC Super Bantamweight Champion twice in 1996 and 1997, but lost both times.Many began to believe he was no longer capable of fighting at the world level, and in November 1997, Tatsuyoshi challenged undefeated WBC Bantamweight Champion Sirimongkol Singwangcha, with the intent of retiring if he failed to win.Despite the odds, he won by TKO in seventh round, reclaiming his title after three years.