Newcastle United boss Eddie Howe admits they defended poorly in defeat at home to Nottingham Forest.
Newcastle had the lead, but were beaten 3-1 with former Toon striker Chris Wood scoring a hat-trick.
Howe later said: "Our first half performance was pretty good. Second half was difficult, we didn't play particularly well.
"We were probably close to making it 2-0 then we get caught and they score.
"Newcastle were always in the game. They had pace and physicality. We pride ourselves in defending those situations better and for whatever reason that wasn't there today.
"I am already analysing what happened today and as always we look to improve. Hopefully we get some training time now.
"I don't think there's one reason. I think it's a whole combination of things as to why we've not been at our best."