What is the fine-grained topic of the following text: Reports quoted Krstajic as telling Serbian reporters that German referee Felix Brych — who denied his team a penalty when two defenders wrestled down striker Aleksandar Mitrovic — should be put on trial in The Hague, home of the United Nations’ war crimes tribunal for the former Yugoslavia. Only return the topic.
Krstajic's criticism of referee Felix Brych's decision during a football match