Theo Walcott thinks Arsenal fans didn't see the 'real Arsenal'
Gunners fans were heard chanting 'You're not fit to wear the shirt'.
And Walcott admits Arsenal fans are entitled to have their own opinion.
Arsenal player ratings against Crystal Palace Mon, April 10, 2017
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Arsenal fans were left furious after the display against Crystal Palace
We work as best we can. Tonight it didn't happen, all we can do is apolgise
"The biggest thing would be letting the fans down tonight," Walcott said.
"That's not Arsenal at all. Tonight wasn't us. We're very disappointed and have let the fans down. We have to respond.
"Everyone is entitled to their opinion. We work as best we can. Tonight it didn't happen, all we can do is apolgise.
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"You could tell they wanted it more. You could sense that from the kick-off. It was an uphill battle.
"This isn't Arsenal."