Following les Bleuets' victory on penalties over Uruguay on Saturday, Pierre Mankowski declared himself "incredibly happy" that his team did not give up
The tie finished 0-0 after extra-time but les Bleuets were able to put the South American side to the sword on penalties 4-1 to claim the Fifa trophy.
Mankowski was thrilled for the success of his young footballers and insisted that he had believed they could win the tournament from the start.
"We are very pleased, the team are incredibly happy," Mankowski told reporters following the victory. "It's pretty great for French football.
"I've always said that with this squad we had a good chance. Frankly, I believed from the beginning.".
Mankowski thinks that the win is down to a team effort from the squad, the coaching team and the supporters to triumph in Istanbul.
"This win is not for me but for all the set-up," he added. "It is six weeks we've been together, they all worked like crazy.
"Everyone got into the spirit, we are very happy together but this is for the 21 players, the staff, the fans. We feel that there are many people behind this team. This was magical. This is a beautiful title - being world champions is the ultimate accolade but all titles are beautiful."
France U20s finished second behind Spain in Group A then beat hosts Turkey 4-1 in the last 16, underdogs Uzbekistan 4-0 in the quarter-finals and then Ghana - who qualified from the same group as les Bleuets - 2-1 in the semis to reach the climax on Saturday.