Referee Szymon Marciniak was heavily criticized for his performance in the match between Porto and Manchester City. Manchester City's Croatian defender, Josko Gvardiol, should have been sent off during the match, according to the analysis of the refereeing performance.
Marciniak received a rating of 5 for adopting an overly permissive approach, allowing play to continue in various situations without intervening appropriately. His "let it play" approach was considered excessive and detrimental to controlling the match.
The referee's assistants were praised for their accuracy in offside decisions, demonstrating technical competence in these specific calls.
In the disciplinary aspect, three situations were identified where yellow cards should have been shown but were not penalized by the referee.
