A trip to rock-bottom Huddersfield gives Arsenal the opportunity to win their first league game away in six attempts.
Emery said, "These matches are difficult and they are playing for the possibility to continue in the Premier League.
"Their last results have not been good but with their new coach (Jan Siewert), I am sure that they are going to play with big ambition and a big performance on Saturday.
"I think they have good players with a good organisation. They push a lot and I know it will be difficult. For us as well, away games have been a challenge and each match is a new challenge."