The Blaugrana star insists quotes attributed to him by Kepes Sport were fabricated and will now mull over taking the matter to the courts over what he perceives as libel
The Argentina international had been quoted as saying by Kepes Sport that his colleagues in the Catalan side's youth ranks, including Cesc Fabregas and Gerard Pique, initially believed he had problems as a teenager.
He also reportedly thanked Neymar for his positive comments about him, but the three-time Ballon d'Or winner has since told Argentine television that all of the interview was fabricated.
"That interview never existed," Messi stated to Teleam. "I would like to deny having made that interview.
"I reserve the right to take legal action [against Kepes Sport]."
Messi will resume training with Barca on Monday, ahead of the club's first pre-season friendly against Hamburg on July 24.