Thauvin signed for Lille in January but stayed with Bastia on loan for the rest of last season, before deciding that he had no intention of playing for Les Dogues.
The 20-year-old eventually completed a protracted move to Marseille before the transfer window closed, with the playmaker adamant that he made a move across Ligue 1 for the right reasons.
He told reporters: "I don't have to justify myself. I know what I did and why I did it.
"Sometimes things happen internally that the public is not aware of."