"Last season I would say Ash was one of the best centre-backs in the Premier League, I cannot think of many who were better than him. The job he did was incredible," he told reporters at a press conference.
"A price of £10m or more to sign him is completely justified. You see some of the money that gets spent in this league on players who are unproven in the Premier League. I think £10m is more than a fair price."
Davies has also been linked with a move away from the Liberty Stadium this summer.