Arsenal manager Arsene Wenger fears his side's 5-1 demolition at the hands of Liverpool "raises some questions" heading into the business end of the Barclays Premier League season.
Braces from Martin Skrtel and Raheem Sterling, plus another strike from Daniel Sturridge, saw the Reds to a famous win over the side leading the way in the standings at the start of the day.
A number of errors contributed to the Gunners' miserable afternoon on Merseyside, and the experienced Frenchman admitted to being concerned by what he saw from his players.
"It was a very poor day. We were poor defensively, offensively," Wenger told BT Sport.
"Liverpool played very well, so congratulations to them. But it was a poor performance on a day when we couldn't afford it.
"Of course it raises some questions today because we were caught many times and were naive."
Asked how he would look to right the wrongs, Wenger added: "Defensively we need to be more stable. Today we were too open. From the front to the back we were not at the level we are used to."