The former Leeds United midfielder knows that without the help of top-class medical and support staff his battle back from knee injury would have been tougher.
"The operation that I had was a difficult operation but Andy Williams was very good," Delph told the Sunday Mercury.
"It cost me an extra two months but at my age it was worth doing and my knee's been fine.
"He also worked with several of the younger boys in our team because we had five cruciates last season.
"He did all of them and they've all came back successfully - but he's very secretive and he doesn't like to talk about other players.
"I also worked with a guy in America who did some work with Tiger Woods.
"He was a rehabilitation specialist and he showed me some different methods to what we do here.
"I took his ideas and mixed them both together, he was very good, I was very impressed with him.
"It helped me a lot - but I'd like to think that I'm mentally strong anyway. If I felt niggles I wouldn't let it get to me.
"It was just a case of getting my brain used to sending messages to my knee and trying to get everything working in order again.
"It seems like it's coming together now, though."