Mikel Arteta has already outlined his demands from his Arsenal players despite only taking charge on Friday.
The new Gunners boss was in the stands for Arsenal's 0-0 draw with Everton on Saturday, where defender Calum Chambers won man of the match in a fairly drab stalemate.
Speaking to BT Sport after the match, Chambers said: "Mikel wants us to be brave, take responsibility and to work hard for each other. We'll be working hard on his philosophy this week in training.
"We were ready for the challenge and to battle in the 50/50 duels. We've been working hard in training so I was pleased to contribute to a clean sheet today.
"We're a promising group so we have to work hard and build on today's performance."
Arteta said: “I don’t want people hiding, I want people to take responsibility for their jobs and I want people who deliver passion and energy in the football club.
“Anyone who doesn’t buy into this, or that has a negative effect or whatever, is not good enough for this environment or this culture.
"There are things to change, absolutely, because they’re not performing at the level that we expect them to."
Arteta will have perhaps been concerned by the nature of his new teams performance on Saturday however, with Arsenal managing just one shot on target.
He is believed to have warned his players that he would be in attendance.
ESPN report Arteta said: "I will be in the stands tomorrow [Saturday] at Everton . I want you to know that I will be watching your attitude, your efforts, your body language.
"I will see what you do when we lose the ball, what your attitude is. Also, what you do when we have the ball."
The former Man City no.2 is set to lead the Gunners for the first time away at Bournemouth on Boxing Day.
Arsenal then face both Chelsea and Man Utd within the following week, before a tricky FA Cup test at home to Leeds.