https://www.livestreamhd.net/2020/12/worst-piece-of-refereeing-this-season-former-pgmol-boss-keith-hackett-slams-decision-to-book-fred-for-headbutt-between-manchester-united-and-psg/
“Worst piece of refereeing this season” Former PGMOL boss Keith Hackett slams decision to book Fred for headbutt between Manchester United and PSG