Complex sentence: The 2007--08 season was not a successful one for Leverkusen despite a good start to the season; five out of the last ten league matches were lost to clubs in the lower half of the table.
Split into simpler sentences: The 2007--08 season was not a successful one for Bayer Leverkusen despite a good start to the season. Five out of the last ten season games were lost to clubs in the lower half of the table.