NOTTINGHAM FOREST remain winless under Ange Postecoglou as they suffered yet another defeat to Sunderland.Postecoglou, 60, counts two defeats in his first four matches since replacing Nuno Espirito Santo at Forest.Sunderland defeated Nottingham Forest thanks to Omar Alderete’s winnerRichard Bowcott/IPS/ShutterstockForest are still winless under new manager Ange PostecoglouNick Potts/PA WirePostecoglou has lost two out of his first four matches as Forest managerMatt West/ShutterstockSunderland climbed up to third place in the Premier League tableIan Horrocks/Sunderland AFC via Getty ImagesMore to Follow