Goals from Adam Webster and Maupay sealed a deserved 2-1 success at The Emirates which lifted Graham Potter’s men to 13th in the Premier League table.
Dunk said: “It’s a great night for us. We made it tough for ourselves after the way we played in the first half when we were excellent and probably should have been further than one goal ahead.
“We expected a reaction and Arsenal showed what sort of side they could be at the start of the second half. We showed great character to hit back and get the win.
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Maupay’s 80th-minute winner earned him the man of the match award and the French striker believes Albion’s performance merited three points.
“We played well at Liverpool and did so again tonight but the difference was we got the win,” said Maupay. “It will give us a lot of confidence for Sunday’s game against Wolves.”
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The French striker's fifth goal of the season was his first in six games. “I have been struggling a little bit in the last few weeks but I kept working hard and I am so delighted for myself and this group of players.
“We hope it’s a trigger for us. We lost three games and were in a bit of trouble, but this win will really lift us and give us a lot of belief in the work we do.”