Unai Emery has warned his Arsenal players they face a "very difficult" contest against Newcastle United on Monday night.
The former Seville boss and his squad have just returned from a warm weather training camp in Dubai and are looking to continue their good home form at the Emirates Stadium.
Arsenal beat Manchester United 2-0 in their last home encounter, and while United have not won in London all season, Emery said: "It’s not my thought now, because I know Monday’s match is going to be very difficult.
"Newcastle are in a good moment.
"They have a lot good players and good organisation.
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"The coach has a lot of experience and he is very competitive and I know that.
"The last matches they are playing, they are playing with a big confidence and very strong defensively and very competitive.
"My focus is on how we can break their defensive positions and also a big performance for us to take a win against them."
Emery is attempting to take Arsenal back to the Champions League in his first season since taking over from Arsene Wenger.
He said: "I know Monday’s game is giving us a big challenge against them.
"I know we are strong at home but we need to continue working like we are doing and also keep moving forward with a big ambition and big atmosphere in our stadium.
"I want to create each match with this atmosphere to show them our best performance with our system and tactical plan.
"Every match is a big challenge for us."
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