Arsene Wenger believes Arsenal's win over Bayern Munich will serve to strengthen belief that his squad can land a major honour this season.
The Gunners took on a Bayern side that had won nine games in a row in the Bundesliga and both of their Champions League games so far this season, but late goals from substitute Olivier Giroud and Mesut Ozil handed Arsenal their first points in Group F.
Arsenal next travel to Munich in November and still have it all to do to qualify for the knockout stages following their losses to Olympiacos and Dinamo Zagreb, but the win over Europe's most in-form side has got Wenger believing his side can challenge the very best.
"It can strengthen our belief and strengthen the belief of people of around us, our fans," said the Frenchman following the 2-0 win.
"We won 3-0 against Manchester United, 3-0 against Watford and 2-0 (over Bayern), so it is important we have a good balance between defending well and attacking well. As long as we defend well and score goals then the balance is right."
Gallery: Arsenal stun Bayern
Arsenal are now third in Group F alongside Zagreb, but still need other results to go their way to be certain of reaching the knockout stages.
"We had an absolute necessity to win the game and we did it in an intense and disciplined way," said Wenger.
"It was a top-level game between two top-level teams. Bayern had more possession than us, but we decided to make it tight in our final third and catch them on the break.
"Overall we have beaten a very strong team and kept a good level focus from the first to the last minute and kept a clean sheet as well."
Wenger added: "We (still) need a result at Bayern. Now let's focus on Everton (in the Premier League on Saturday)."
Pep Guardiola, who had not seen his Bayern side lose inside 90 minutes this season, refused to blame Neuer's flap for costing Bayern a result in London and was pleased with what his injury-hit team produced.
"Never in my life have I criticised a player for taking decisions if correct or not correct. We did not lose because of Manuel Neuer. This is football and he took a decision in that situation - that is it," Guardiola said.
"I'm so proud of my team. I like to win so I'm not happy but we played with a lot of courage to come here and take the ball off of the Arsenal players."