The hosts appeared to be coasting after Stephan Lichtsteiner's first goal for the club was added to by Emile Smith Rowe.
"In each moment for each match, we are going to give the goalkeepers the opportunity to help us", Emery said.
And Emery has opened up on the Carabao Cup draw, revealing Arsenal are ready for all Tottenham will throw at them.
"Whether we play here or play away, it is important we play for our support".
Bellerin suffered a right thigh injury at Selhurst Park and Arsenal have confirmed he will be assessed ahead of Liverpool's trip to Emirates Stadium on Saturday - where a win would move Arsenal to within one point of Jurgen Klopp's side.More news: Pakistan improves its ranking in World Bank's Doing Business Report 2019
"I said many times maybe the best way is not to be in England, because I spent so much time at the same club it would seem odd to go somewhere else", Wenger said at the launch of the Twinning Project at Wembley.
"When I can watch I am an Arsenal supporter and I am happy when Arsenal win and unhappy when they don't win", he told the BBC.
Blackpool didn't take long to make their man advantage count as they made it 2-1 in the 66th minute when Paudie O'Connor was left free to head home from a corner to reduce the deficit.
"They competed very well".
"Their goal also - we need to continue our work".