George Graham says a booze culture at Arsenal prevented the club from winning more trophies during his time in charge.
Now, writing in an appendix to Sansom's autobiography, To Cap It All, Graham praises the England player as 'a left-footed, left-back genius' but also laments the off-field failings of some of his squad.
"When I look back at my time managing Arsenal in the Eighties, I wonder how much more we could have achieved had my team not been boozing so much," said Graham.
"Don't get me wrong, they gave their all - Kenny, Tony Adams, Paul Merson and the others - but their activities off the pitch must have had a detrimental effect on their overall performances. Tony and Paul have spoken about their battles with addiction and now it's Kenny's turn to tell his story."