Arsenal manager Arsene Wenger admits he is concerned about the gap developing between his spluttering side and the rest of the Premier League title contenders.
Wenger's team crashed to their second defeat of the season at Norwich City on Saturday as Grant Holt punished a mistake from Gunners goalkeeper Vito Mannone to score the first-half winner.
The north London outfit have won only three of their first eight league matches and are now ten points behind leaders Chelsea.
They are also in danger of losing touch with the top four in the race for UEFA Champions League qualification after a first defeat against the Canaries since 1992.
"The gap at the top is unpleasant," Wenger said. "We had an opportunity to close the gap but we didn't. It does worry me but what is more disappointing is we didn't score."
Despite a disappointing display by Lukas Podolski and the Gunners attack in general, Wenger insisted he would not necessarily be dipping into the January transfer market for a new striker, although he was critical of his forwards' efforts.
"We will wait until we see how players are when they come back. We did not create enough that is for sure," he said. "It was a poor collective offensive performance, although we have scored goals up until now.
"We have to give Norwich credit because they were very strong and organised and they stopped us very well."
Wenger admitted Arsenal were caught out by Norwich's intensity and struggled to find a way back after Holt's 19th-minute finish.
"I believe we have to face the reality of the Premier League and if you are not ready from kick-off then you have no chance," Wenger added. "What can I do now? I am angry because we have not created very much.
"We were not in the game for the first 20 minutes and they scored and it made it difficult. We had to equalise before half-time and did not do that. There was always something missing - defensively we were not at our usual level."
Arsenal will look to get back to winning ways in the Champions league on Wednesday when they take on Schalke, who won impressively in the Bundesliga against champions Borussia Dortmund.
"It was a great result for Schalke in Dortmund and a good performance," said Wenger. "We will see how things are on Wednesday."