Undesired reporter

Everybody wants to attend the greatest football show on earth next month, but for some it may only be a dream. In other words: if you talk something bad about the host country you will likely get banned, even in you work in television.
He was planning to report from the World Cup in Russia, however this German journalist nevertheless will stay at home as his visa was revoked. Hajo Seppelt is a investigative reporter at public broadcaster ARD, which is among the first who uncovered the story of allegedly Russian doping scandal (mostly in athletics). Thus from last Saturday, the authorities have put him on blacklist, however few days after that his accreditation has been put back on. Now the real question is whether the journalist is going to be able to report about this world event undisturbed, which nobody yet knows.