Although he was finished several times , including by a memorable knockout upkick by Renzo Gracie , Taktarov was never submitted during his career .
Taktarov won the vast majority of Taktarov 's fights by submission .
Although he was finished several times , including by a memorable knockout upkick by Renzo Gracie , Taktarov was never submitted during his career , and he won the vast majority of his fights by submission .