Middlesbrough's Walker targets Bayern Munich impact
He said: "I'm enjoying it. You have to work very hard and concentrate throughout every game and the only thing that has disappointed me is the results.
"If I am selected to play on Thursday it will be a proud night for me. I'll try to do the best I can for the team."
Walker is on loan at Pittodrie until the end of the season, but recently signed a contract extension with Boro which takes him until the end of next season.