Arsenal boss Arsene Wenger felt his side showed against Lincoln City that they have their confidence back, following a heavy defeat by Bayern Munich in the Champions League.
The Gunners beat the non-league side 5-0 at Emirates Stadium on Saturday to reach the FA Cup semi-finals.
It came after they lost 5-1 to Bayern Munich at the same ground on Tuesday.
"We have been short of confidence after some disappointing results recently," said Frenchman Wenger.
"When the confidence was there in the second half, our quality came back.
"It was all us in the second half but you have to congratulate Lincoln for what they have achieved in the FA Cup."
Lincoln, 88 places below their Premier League hosts, were the first non-league side to reach the quarter-finals of the competition in 103 years.
'We had to respond'
This was a much-needed win for Wenger after a difficult couple of weeks for the 67-year-old.
Arsenal had lost five of their seven games prior to the visit of the Imps - including 5-1 defeats home and away to Bayern Munich and a 3-1 loss to Liverpool in the Premier League.
Wenger's long-term future at Arsenal is uncertain, with his contract due to expire this summer, and there were protests calling for him to step down prior to Saturday's game.
Arsenal initially looked nervous against Lincoln before Theo Walcott opened the scoring just before half-time.
Olivier Giroud put the hosts in control with a clinical strike, with an own goal from Luke Waterfall and goals from Alexis Sanchez and Aaron Ramsey completing the win.
"We were a bit nervous because your confidence drops when you don't have the results," added Wenger.
"The team was unjustifiably criticised for our last game against Bayern Munich because we had an outstanding game.
"The game was killed not by the fault of the players but we have to look at the bigger perspective.
"Overall, we had to respond and that's what we did."