The English keeper is adamant his side have nothing to fear after their battling back-to-back displays against Celtic.
Derek McInnes' troops have been strong at home since their return to the Premiership and now face a huge Rugby Park test against Rangers.
But Walker and his team-mates are convinced they can do damage against Michael Beale's side having given Celtic problems at the National Stadium on Saturday.
He said: "We went to Hampden full of belief and it will be the same on Wednesday night.
"We love playing at home, in front of our own fans. It is another big game. It is on TV, under the lights and we will be up for it.
This story is from the January 17, 2023 edition of Daily Record.
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This story is from the January 17, 2023 edition of Daily Record.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 8,500+ magazines and newspapers.
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