As posted by Fabrizio, Nottingham Forest has parted ways with it's manager Nuno Espirito Santo, these's was a tense situation at the club between him and them, I believe that's the main reason why he was sacked. Nottingham Forest has started off this season with a win, a draw and a lose in three matches. I believe that's one of the major trigger as to why he and the club management has fallen off and it resulted in a sack.
I don't know how the management of Nottingham Forest came up with the decision to sack Nuno Espirito Santo because this was a coach that made remarkable impact in the club last season despite that they didn't qualify for the Champions League games after they reached third position in the league table before they dropped down to 7th position at the end of last season but they still made it to the Europa League games which is still a good achievement but for the club to sack Nuno Espirito Santo after just 3 games this season is really sad. When we were still condemning the sack of Eric Ten Hag by Bayern Leverkusen after only 2 games now it's Nottingham Forest sacking a coach that is still doing well for the club.