De Zerbi specifically credited Davies alongside teammates like Radu Dragusin and Rodrigo Bentancur for maintaining a positive locker room atmosphere during the relegation fight.
"Dragusin was top because he didn't play, but he was always positive inside the dressing room. Inside the pitch.
Bentancur, when he came back from the injury, he wanted to play," De Zerbi said.
The Italian manager praised several squad members for showing the necessary courage to turn the club's fortunes around after he took over in March.
De Zerbi managed three wins and two draws in his seven games at the helm to secure safety.
"Joao Palhinha, because at the beginning of my time, he didn't play in Sunderland, here with Brighton and Wolverhampton.
Ben Davies. Yesterday, he came to the Lodge with us," De Zerbi added.
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Davies expressed his commitment to the club, saying, "My heart's on my sleeve for this Club and I'll give everything for it."