Complex sentence: In 2007 he beat future unified light-heavyweight champion Sergey Kovalev in the semi-finals, and eventually beat Evgeny Makarenko in finals to qualify for the World Championships.
Split into simpler sentences: In 2007 he beat future unified light heavyweight champion Sergey Kovalev in semi-finals. Eventually beating Evgeny Makarenko in finals to qualify for the World championships.