Complex sentence: Smith also became the first Australian skipper to open their captaincy with three consecutive centuries, and the second batsman since Jacques Kallis against West Indies to score a century in every match of a Test series.
Split into simpler sentences: Smith also became the first Australian skipper to open their captaincy with three consecutive centuries. He also became the second batsman since Jacques Kallis against West Indies to score a century in every match of a Test series.