West Brom defender Olsson confident of Man Utd shock
Olsson said: "We're not going to apologise for being sixth because we deserve to be there.
"We need to keep going and keep believing in our game-plan.
"But if you win at the Emirates as well as we did, then you shouldn't fear anyone."
Olsson insists any trip to Manchester United will live long in the memory.
He added: "When you look back at the end of your career, you remember going to great places like Old Trafford and the Emirates.
"The way we're playing at the moment makes me confident and inspired to go up there and give them a test."