Walker rates Zinchenko among the most technically gifted players at the club.
He said on Timbsy: "Not in any order, because I wouldn't want to put them in any order, my top three are Zinchenko, [Riyad] Mahrez and [Bernardo] Silva."
On the Ukrainian, Walker added: "He's incredible, incredible. Two touches, head tennis, he's incredible. So good, so, so good.
"And then you're leaving the likes of De Bruyne out, Phil Foden, Cancelo. But they don't come close to those three."