Complex sentence: After its biggest growth in 2010,2011 saw a significant contraction with just six football clubs continuing their association into the series fourth season, with the remaining cars carrying national identities associated with the competing drivers rather than any football connection.
Split into simpler sentences: After its biggest growth in 2010,2011 saw a significant contraction with just six football clubs continuing their association into the series fourth season. The remaining cars carried national identities with many more closely associated with the competing drivers rather than any football connection.