Watford chairman Russo reveals Man Utd's Ferguson convinced him about Mackay
"Sir Alex rang on another matter but while he was on I asked for his advice and he said Malky was an excellent candidate," Russo told the London Evening Standard.
"Maybe he saw something of himself in him. Malky also has a strong character, he's a disciplinarian and his personality is what you're looking for.
"He just said that if we went with Malky we wouldn't go far wrong and that was good enough for me."