Conversation so far:
When did Miguel Induráin's professional career begin?
In 1984 Miguel Induráin rode in the Olympic Games at Los Angeles and then turned professional on 4 September for Reynolds.
What was Miguel Induráin's first major race?
Miguel Induráin won his first professional race a week later, a time trial in the Tour de l'Avenir.

Question: Where did he go from there?
Self-contained rewrite: Where Miguel Induráin did  go from there?