Complex sentence: Vale made his debut in mixed martial arts in October 1995 in the WCC World Combat Championships when he defeated Mike Bitonio via first-round submission, people expected him to face Renzo Gracie in the finals but Vale wasn't able to continue due to head lacerations.
Split into simpler sentences: Vale made his debut in mixed martial arts in October 1995 in the WCC World Combat Championships when he defeated Mike Bitonio via first-round submission. People expected him to face Renzo Gracie in the finals but Vale wasn't able to continue due to head lacerations.