Mackay has revealed that he rejected the chance to join Alan Pardew's staff at Newcastle when he was at Watford.
He said: "I could have been at Newcastle. We had that conversation concerning me going up there as his number two, but it didn't happen.
"I know Alan well, he is a good friend of mine and he has certainly been a mentor for me over the past few years in terms of conversations we have had.
"I also played for him, I was his captain at West Ham, and he is a good friend of mine and he has done a very good job at Newcastle. He was given a long-term contract and he has brought stability to that club to an extent."
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