Complex sentence: Justine Henin started the season as the No.1 ranked player in the world, and following her impressive 2007 season and her victory at the warm-up tournament in Sydney, she was considered the outright favourite to win the Australian Open.
Split into simpler sentences: Justine Henin started the season as the No.1 ranked player in the world. Following her impressive 2007 season and victory at the warm-up tournament in Sydney, she was considered the outright favourite to win the Australian Open.