The 40-year-old, who currently plays for French amateur side Monts d’Or Azergues, claims that a 16-year-old Messi ‘destroyed’ Barcelona’s stars during training with his ‘incredible’ skill.
Giuly spent three seasons at the Camp Nou, winning five trophies including the Champions League in 2006.
He then moved on to Serie A side Roma before moving back to France to join PSG, winning domestic cups at both clubs.
But it was at Barcelona where the Frenchman made a name for himself, playing alongside the likes of Messi, Ronaldinho, Deco and Samuel Eto’o in one of the most successful club teams of all-time.
And Messi, who was just breaking through the ranks at Barca during Giuly’s spell in Catalonia, went on to emulate his early success, winning no less than five Ballon d’Or awards in the following years.
It will come as no surprise to Giuly, who told Sport: “Messi was only 16, but he destroyed us all in a training session. They were kicking him all over the place to avoid being ridiculed by this kid, but he didn’t say anything.
“He just got up and kept on playing. Every play he made was dangerous. It was incredible.
“He would dribble past four players and score a goal. Even the team’s starting centre-backs were nervous.
“They would go in hard on him, but he took it in. He was an alien. He killed us all.”