Nottingham Forest fans were heard serenading Ange Postecoglou with ‘sacked in the morning’ chants during their 3-2 defeat to Midtjylland.Valdemar Byskov cooly netted for the visitors with two minutes left of stoppage time to put the Danish side 3-1 up in the Europa League tie to inflict another winless result for Forest.Forest fans jeered Postecoglou just moments after conceding their third goalGettyChris Wood pulled a goal back with a stoppage-time penalty but it proved to be a mere consolation on a chastening night for Postecoglou’s men.Postecoglou is yet to win any of the six matches he has taken charge of since he replaced Nuno Espirito Santo last month.The Australian becomes the first permanent Forest manager for 100 years to fail to win any of his first six games in charge of the club.And he met the frustration of the Forest faithful at the City Ground as they jeered their own manager about his future.Speaking to TNT Sports afterwards on the chants, he said: “I heard it. “They’re fans, they want to see their team win. They’re entitled to their opinion.”Defeat to Midtjylland is their fourth across all competitions under the former Tottenham boss.Forest have dropped into the bottom third of the Europa League league phase with just one point to their name.Postecoglou’s dismal start at ForestEspirito Santo, who is now at West Ham, was the latest controversial dismissal at the City Ground since his predecessor Steve Cooper.Forest then decided to bring in Postecoglou, who won the Europa League with Spurs in the summer before his own harsh dismissal.Postecoglou is yet to find a way to win at ForestGettyHe was first tasked with beating Premier League title challengers Arsenal, who won 3-0 at the Emirates Stadium.Postecoglou was also met with ‘sacked in the morning’ chants on that occasion, but insisted he ‘loves being back’.Forest next faced Swansea City in the third round of the Carabao Cup and led 2-0 at half-time with a double from Igor Jesus.But Swansea netted two goals in second half stoppage time to seal a dramatic 3-2 comeback win.A 1-1 draw against Burnley in the Premier League was followed by a 2-2 Europa League draw against Real Betis.Yet again, Forest were leading in Spain before a late goal from Antony ensured they remained winless.Forest’s stats under Postecoglou make for grim readingHigh-flying Sunderland became the third side to beat Postecoglou and his new club at the weekend.Forest are now at risk of falling behind in the Premier League and crashing out of Europe in what has been a miserable start.