Comment: Napoli situation a healthy reminder of the need for the PFA

After Napoli chairman Aurelio De Laurentiis forced his players to go into a 7-day-a-week training camp and star player Lorenzo Insigne was fined 350,000 for allegedly organising a mutiny against the chairman’s reaction to a string of very poor results, we look at how influential the PFA (Professional Footballers’ Association) has been in England over the years on its 112th birthday.