Gilberto Silva felt luck deserted Arsenal against CSKA Moscow on Wednesday evening.
The Gunners banged on the door all evening but were unable to break through as CSKA took a point back to Moscow.
Thierry Henry, Cesc Fabregas and Tomas Rosicky all passed up gilt-edged opportunities at Emirates Stadium and Gilberto feels The Gunners were not rewarded for their excellent display.
"I think luck comes in the game if you work hard, but sometimes it does not come and you don't score," the Brazilian midfielder told Sky Sports News.
"I think the way we played was brilliant, we played very well during the game but were unlucky."
Arsenal are second behind CSKA in Group G, but have Porto breathing down their necks and face a tough trip to pointless Hamburg in three weeks.