DAVID LUIZ issued a grovelling apology to sacked Arsenal boss Unai Emery, insisting: We let you down.

Gunners chiefs decided to wield the axe on Friday morning after last night’s humiliating 2-1 home defeat to Eintracht Frankfurt in the Europa League.

Luiz, who was forced off injured after just 31 minutes, admitted Arsenal's flops let Emery down

He tweeted: "Sad day for everybody, especially because we let u down Boss, sorry.

"Thank you and the amazing staff for everything. You are a hard worker, passionate for football and a big example always, doesn't matter the results.

"Good luck for the future."

Emiliano Martinez and Dani Ceballos followed suit.

Keeper Martinez added: "Thank you @UnaiEmery_ and Javi (Garcia, goalkeeping coach).

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