He explained to the Sunday Mirror: "The thing that links the three of us is being able to spot a good player, motivate and handle them.
"Paul had his problems, which have been well documented and one day he came to me and said, 'Harry, I need some time off. I'd like to go to Tony Adams' clinic and get my head right'.
"Naturally I was very supportive. But bugger me, a few days later a mate of mine rings me and says, 'Harry, I've just seen Paul Merson on the beach in Barbados'.
"He came back six days later in the middle of winter with the most spectacular tan I'd ever seen. Now I could have gone ballistic, fined him or thrown him out the club. I didn't say a thing.
"On the Saturday we won 2-0. He scored both goals and was the best player on the pitch. It's knowing how to handle certain individuals that counts."