A trip to rock-bottom Huddersfield gives Arsenal the opportunity to win their first league game away in six attempts.
The Gunners boss was quizzed at his Friday press conference if side's travel sickness was down to tactics or mentality.
Emery replied: “Maybe both - It can be... at the end, the reason we didn't take the same balance as we have shown at home.
"I spoke with the players (and told them) we need to think this match is very important for us and every player needs to be ready, be focused and be thinking we need to win this match.
"Imposing ourselves from the first minute, and throughout the 90 minutes, our capacity against them - but first is the mentality.
"For us, tactically, is the second issue. The first is to think we need to win and after it's how we can win this match - (in terms of) preparing tactically and individually."
"We started very well away, changing our mentality, but now we need to recover this confidence, to recover this performance and the next opportunity is Saturday against Huddersfield.
"But it is difficult. These matches are difficult and they are playing for the possibility to continue in the Premier League."