Arsenal manager Arsene Wenger says his side could have scored more goals during their 3-2 away victory against Brighton & Hove Albion.
After last week's remarkable win against Manchester City away from home in the Premier League, Arsenal progressed into the next round of the FA Cup with Theo Walcott and Mesut Ozil both on target for the Gunners.
It was the German's first goal for the club since September.
Midfielder Tomas Rosicky was also on the scoresheet after producing a sublime low volley after a neat one-two combination with striker Olivier Giroud.
"I believe our performance was good and there was room to score more goals with the chances we created," Wenger said.
"Overall what you want first is the quality of the performance and to go through. They had two shots on target. When you play away from home and the other team had two shots on target - overall I think we produced the performance I expected.
"We have a good momentum but let's keep the urgency level very high and we know how quickly the momentum can die in football if your quality drops a little bit.
"We have a good opportunity to finish well this season so we have to show that we can compete in every single game now and earn our right to win the games."
Chelsea, Manchester City and Tottenham Hotspur all crashed out of the competition on Saturday but the Frenchman says it's too early to brand the Gunners as favourites.
"With yesterday's results you would be a bit cautious," he said.
"The cup is the cup - what you want is to focus on the next round to go through. We have a good experience from last season to know that every round is difficult.
"The most difficult games were not especially the expected ones last season, so let's wait for the draw. Of course we'll fight and we want to retain our cup but there's too long to go to say [that Arsenal are favourites].
"I think the results yesterday was a bit of a subconscious warning for us.
"It wakes you up a bit and you think, 'okay it's a Championship team' but you know that the players in lower-level teams are prepared now - they come out of the academies, do not make it in the Premier League but they are not far from it.
"They can maintain the pace for 90 minutes and in these kinds of ties they never give up. Even if you look in League One, you look at the games and the teams play good football. If you're not ready, you can lose."
