Arsenal boss Mikel Arteta was calm over Takehiro Tomiyasu's red in victory at Crystal Palace.
Martin Odegaard converted a penalty won by Eddie Nketiah early in the second-half before Arsenal defender Tomiyasu was sent off. Tomiyasu was booked for taking too long with a throw-in before receiving a second yellow for a foul on Jordan Ayew.
Arteta said: "For me it's not an issue. It's the referee's call, they are consistent with that, they explained it and the only thing we are asking for is consistency. If not, we have to play with a stopwatch to understand what it is and what it's not.
"The decision is made, we are not going to change it now. We adapted to it, unfortunately it made the game obviously much tougher and normally you drop points when you have to play in this league for 30 minutes away from home. To survive the way we did is not something that usually happens, but we are so happy that we overcame that big hurdle."
