Emmanuel Petit told Thierry Henry to be 'more humble' when the pair played for Arsenal.
Petit believes Henry failed as manager of Monaco because he was stuck in the mindset of a player.
Henry was sacked in January by the Ligue 1 club after three months in charge and five wins in 20 matches.
Petit told Paddy Power as per the Mirror: 'Thierry was a tremendous player.
'Everyone knows what he has done on the pitch. Now he wants to be a manager and his first job at Monaco did not go well – I think he is still a player in his mind.
'You have to change the mentality – you can't keep the player's mindset if you want to be a manager.
'The way you talk to players and control training sessions is very important. Even if it's your first job, footballers will test you constantly.
'As a player, Thierry was terrific and I hope he achieves the same as a manager. But I remember saying something to him at ArsenaI.
'I told him, "Every time you score a goal, you should be more humble and try to have a connection with the fans, rather than living in your own world". He didn't like it.'
Petit also insisted that Henry is not as loved by French supporters after his infamous handball in the 2009 World Cup play-off against the Republic of Ireland.
