Giggs and Neville were named to David Moyes' coaching staff this week.
"They may have passed the necessary coaching qualifications but it is a bit like becoming a driver. You don't become a great driver the night after passing your test. I'll be very interested to see how it evolves with both Phil and Ryan.
"You have to time to go out, practise and sometimes fail. Sometimes sessions won't work and they will have to ask 'why?' But what a great place though to come in and be able to say to David Moyes, 'can I have a quiet word?"