UEFA Referee Categories
Difficulty: Medium
Notes: Full UEFA Referee Categories list at http://law5-theref.blogspot.com/2019/06/uefa-category-revisions-aliaksiej_18.html
Notes: Full UEFA Referee Categories list at http://law5-theref.blogspot.com/2019/06/uefa-category-revisions-aliaksiej_18.html
2018/2019 UEFA Champions League knockout stage referees
Difficulty: Low