The Madejski Stadium crowd saw the Gunners fight back from 4-0 down to triumph and qualify for the quarter finals.
"I did not think about when we had to equalise, I just felt that if we had the chance and God will help us, we will make a draw!" Arshavin told Arsenal Player.
"He helped us and that's why we scored in the last minute.
"I have lost twice 7-1, once I lost 8-3 and once I won 9-3 and now 7-5.
"But this game was one I will remember always because it was from 4-0 down.
"I don't think anyone here believed that we could come back. But we did it and we deserved to win.
"We showed spirit because you cannot come back from 4-0 down if you don't have spirit."