Complex sentence: Because of the aforementioned entry restrictions, Manchester United had only met English opposition in Europe twice before, while Chelsea had far more experience against English opposition, having played 12 matches against compatriot clubs, winning five, drawing five and losing just two.
Split into simpler sentences: Because of the aforementioned entry restrictions, Manchester United had only met English opposition in Europe twice before. Meanwhile, Chelsea had far more experience against English opposition, having played 12 matches against compatriot clubs, winning five, drawing five and losing just two.