Manchester United and Manchester City will face a quick turnaround when they return from the international break.Both sides face Premier League games on October 17 before the Champions League group stage kicks off in midweek.The Reds are in action against PSG on Tuesday, October 20, with City facing Porto the following day.There are also some rule changes to prepare for in this season's competition.In contrast to the Premier League, UEFA have retained the decision to allow clubs to make five