It makes no sense at all to me. To paraphrase:
Ryan Giggs declared that today marks the beginning of a new chapter. Fans will hope it is just half as good as the old one.
Why on earth would fans hope that? Enemies and rivals might hope that, but fans would certainly hope that this new chapter will be as good as or better than the last. There may perhaps be some satirical or sarcastic meaning, but I don't know enough about football or Ryan Giggs to figure it out.
Student or Learner