Walker has taken on the manager's philosophy at right-back.
"What I am so delighted about is that after one or two years, Kyle is improving in that position," said Guardiola.
"The last game for us was one of the best Kyle has played since we were together.
"He is another type of player with his physicality that you have on the outside but playing inside you need special qualities and I am very pleased with what he is doing in the last month with us."
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