Arsenal boss Arsene Wenger is unwilling to change a winning formula as he prepares his in-form side for Tuesday's Champions League encounter with Slavia Prague.
The Gunners have won 13 of their 14 games in all competitions so far this term, including two victories against Slavia's city rivals Sparta in August.
Wenger is happy to keep an unchanged line-up against Sparta even though he knows the likes of Jens Lehmann and Gilberto Silva are unhappy with their lack of first-team opportunities.
"I never had that before, but you can only trust to what you see," said the Frenchman.
"It is the price of the team doing well on a consistent level for four, five, six games.
"We are in a job where competition is vital and we have to deal with those kinds of situations and the top-level players deal with that.
"Gilberto and Lehmann are certainly not happy, but their attitude in training is certainly spot-on.
"That's where you gain more respect. My biggest job is to win the next game, and my players are so professional they will always behave like professionals.
"It's unjust to change the team if you are doing well. They are not happy to be in the situation of course. I never try to convince someone to be happy in a position like that."