Complex sentence: A German fighter of Croatian origin, Stefan Leko, triumphed in front of his fans, while in the final bout of the evening, great South African K-1 star Mike Bernardo defeated Belarus Sergei Gur via TKO in the second round.
Split into simpler sentences: A German fighter with Croatian roots, Stefan Leko, triumphed in front of his own crowd. In the final battle of the evening, great South African K-1 star Mike Bernardo defeated Belarusian Sergei Gur by TKO in the second round.