Henry had been sent to the Vitality Stadium to check on the progress of fellow countryman and Bournemouth forward Lys Mousset when he was approached by manager Eddie Howe to talk to his players.
Fraser said: “We were in a meeting and were told we had a special guest coming in.
"Then Thierry Henry walked in and you were like, 'What? Is this real?'
“He was talking about training techniques and saying he wanted to respect his team-mates by showing he was better than them – not to make them annoyed or frustrate them.
“But he felt he had to go out on the pitch and be better to show them why he was keeping them out of the team. I thought that was interesting because in football things go on behind the scenes and you don't want people taking your spot.
“I didn't know, when you're that good a player, do you just go into training and say, 'I'm already the best, I don't need to show it today, I'll do it in the game on the Saturday'.
“He said no, every day in training he wanted to be the best player, he wanted to show everyone he was the best and I think that was a good insight."