Arsenal have been eliminated from the FA Cup in third round by Nottingham Forest for the second time in four years.
The 14-time winners were stunned when Lewis Grabban scored the winner with eight minutes remaining.
The Englishman pounced after a terrific cross from Brennan Johnson.
Mikel Arteta made numerous changes to his starting line-up but regulars Bukayo Saka, Martin Odegaard and Gabriel Martinelli all played at the City Ground.
And speaking after the game, Arteta apologised for the performance.
“We were not good enough and we have to apologise for it,” Arteta said.
“I don’t want to use excuses. I expect the team I put out to do better and when you don’t in the cup you are out.
“Today showed we were not capable of winning against Forest away from home and didn’t put in the level to win the game. It’s a collective issue and today we have not done it.”