Arsene Wenger was left disappointed in his players after they suffered an unexpected 1-0 defeat to Sunderland at The Stadium of Light.
The Gunners failed to score for the first time this season as Darren Bent's second-half goal secured all three points for the hosts.
The long-serving Arsenal manager said that his team did not do enough to mentally prepare for a tough battle in the North East.
"It's a big disappointment, basically because we were not at our level," Wenger told Sky Sports after the match.
"I feel that some players struggled really to prepare properly, mentally for a game like that because you know after an international break it's how well and how quickly the team can focus again."
But Wenger did not lay all the blame on international fixtures, stating that the team need to perform to their maximum every week in order to win the Premier League title.
"The international break doesn't help but it's down to us, as a team, to focus quickly again and to show that quality," he added.
"(To win the) championship (you need) to be capable, every time, to turn up as close as possible to your best in a consistent way.
"When you cannot do that, you can lose games like that."
Arsenal's defeat leaves them eight points behind table-toppers Chelsea and Wenger admits that the result comes as a major blow to their title ambitions.
He said: "It is a big setback because you do not prepare yourself to drop points in a situation like that.
"It's not especially worrying, it's frustrating, because I know we have the quality but it is frustrating when you see some performances today - that is very frustrating."
| Time | Fixture |
|---|---|
| Wednesday 10th February | |
| Barclays Premier League | |
| 19:45 | Arsenal vs Liverpool |
| 19:45 | Aston Villa vs Man Utd |
| 19:45 | West Ham vs Birmingham |
| 19:45 | Wolverhampton vs Tottenham |
| 20:00 | Blackburn vs Hull |
| 20:00 | Everton vs Chelsea |
| Tuesday 16th February | |
| Barclays Premier League | |
| 19:45 | Stoke vs Man City |
| Wednesday 17th February | |
| Barclays Premier League | |
| 20:00 | Wigan vs Bolton |
| Saturday 20th February | |
| Barclays Premier League | |
| 12:45 | Everton vs Man Utd |
| 15:00 | Arsenal vs Sunderland |
| 15:00 | West Ham vs Hull |
| 15:00 | Wolverhampton vs Chelsea |
| 17:30 | Portsmouth vs Stoke |
| Sunday 21st February | |
| Barclays Premier League | |
| 14:00 | Aston Villa vs Burnley |
| 15:00 | Fulham vs Birmingham |
| 15:00 | Man City vs Liverpool |
| 16:15 | Wigan vs Tottenham |
| Monday 22nd February | |
| Barclays Premier League | |
| 20:00 | Blackburn vs Bolton |
| Tuesday 23rd February | |
| Barclays Premier League | |
| 20:00 | Man Utd vs West Ham |
| Saturday 27th February | |
| Barclays Premier League | |
| 12:45 | Chelsea vs Man City |
| Time | Result |
|---|---|
| Tuesday 9th February | |
| Barclays Premier League | |
| Man City 2 - 0 Bolton | |
| Wigan 1 - 1 Stoke | |
| Portsmouth 1 - 1 Sunderland | |
| Fulham 3 - 0 Burnley | |
| Sunday 7th February | |
| Barclays Premier League | |
| Birmingham 2 - 1 Wolverhampton | |
| Chelsea 2 - 0 Arsenal | |
| Saturday 6th February | |
| Barclays Premier League | |
| Liverpool 1 - 0 Everton | |
| Hull 2 - 1 Man City | |
| Stoke 3 - 0 Blackburn | |
| Bolton 0 - 0 Fulham | |
| Sunderland 1 - 1 Wigan | |
| Man Utd 5 - 0 Portsmouth | |
| Burnley 2 - 1 West Ham | |
| Tottenham 0 - 0 Aston Villa | |
| Wednesday 3rd February | |
| Barclays Premier League | |
| Fulham 1 - 0 Portsmouth | |
| Tuesday 2nd February | |
| Barclays Premier League | |
| Hull 1 - 1 Chelsea | |
| Monday 1st February | |
| Barclays Premier League | |
| Sunderland 0 - 0 Stoke | |
| Sunday 31st January | |
| Barclays Premier League | |
| Man City 2 - 0 Portsmouth | |
| Arsenal 1 - 3 Man Utd | |
| Saturday 30th January | |
| Barclays Premier League | |
| Birmingham 1 - 1 Tottenham | |
Portsmouth left it late to grab a point while Manchester City and Fulham were comfortable winners.
Norwich's success this season means more to Chris Martin than most, as Chris Burton found out.
See all the goals and major incidents involving YOUR team, right here on skysports.com.
Manchester City overcame Bolton, Portsmouth salvaged a late draw against Sunderland, Fulham saw off Burnley and Stoke held Wigan.
Aruna Dindane salvaged a priceless point for troubled Portsmouth as they drew 1-1 with Sunderland.
Avram Grant said his dismissal against Sunderland was a product of him 'having enough' of the club's difficulties.
Steve Bruce hit out at Lee Cattermole and David Meyler after the two players saw red at Fratton Park.
Carlos Tevez and Emmanuel Adebayor grabbed a goal apiece as Man City overcame Bolton at Eastlands.