A 2-1 win at Tottenham is enough to brighten any week.

The mood at Arsenal wasn’t fantastic following a disappointing gloss to Dinamo Zagreb and a controversial defeat at Stamford Bridge, but winning the north London derby on Wednesday night has made all the bad things seems a bit more irrelevant.

Arsenal took the lead through Mathieu Flamini in the first half, but Calum Chambers’ own goal levelled the scores with more than half an hour left to play.

Mathieu Flamini of Arsenal celebrates as he scores their first goal during the Capital One Cup third round match between Tottenham Hotspur and Arsenal at White Hart Lane on September 23, 2015 in London, England. (Photo by Tom Dulat/Getty Images)
Mathieu Flamini celebrates after scoring the opening goal in Arsenal’s 2-1 win over Tottenham Hotspur in the League Cup third round. (Photo by Tom Dulat/Getty Images)

With Tottenham boosted and the White Hart Lane crowd getting louder, Arsenal had to survive a small period of pressure but did so excellently before Flamini went on to fire home the winner.

“That was the most pleasing [aspect]. Suddenly when it was 1-1 you could expect Tottenham to find a second goal but suddenly it looked like it was us who were more likely to score a second goal,” Arsène Wenger said after the game.

The closest Tottenham came to taking the lead saw Kieran Gibbs head a Harry Kane effort off the line, but David Ospina was rarely troubled.

Despite having a lot of the ball, Spurs didn’t have enough guile to break down Arsenal, who looked more solid after the break.

The win serves a huge boost ahead of the Gunners’ trip to Leicester City, with Mathieu Flamini the unlikely hero.