Neymar has denied a rivalry exists with Paris Saint-Germain team-mate Kylian Mbappe.
The pair are two of the most valuable players in the world and have accounted for nine of PSG's 14 goals over the past four matches in all competitions.
There have been suggestions that France international Mbappe, 20, has occasionally felt frustrated with perceived favouritism towards Neymar, but the Brazilian insists there is no hidden animosity in their friendship.
"My relationship with Kylian is very good," Neymar told France Football.
"We are good friends and help each other to win matches, to score goals. I feel that there is something special. There is no competition between us.
"We help each other to score goals. When one of us scores, he tells the other one: 'now is your time.'
"This is the way to be in football – be a good team-mate, otherwise things won't go well."
Neymar was involved in a transfer saga earlier in the year, with a possible return to Barcelona failing to materialise before the deadline.
PSG fans initially gave the Brazil international a hostile reception on his return to first-team action, but he has reintegrated himself with some key performances.
With the January transfer window fast approaching, Tuchel insisted Neymar, 27, was in a good frame of mind in the French capital.
"Between him and me, not much has changed," Tuchel said at a news conference ahead of the Coupe de la Ligue clash with Le Mans on Wednesday.
"We have always had a good relationship. He's happy and expects the team to continue to grow.
"He is accepted in the dressing room. He is extraordinary and is gaining physical capacity at the moment.
"He still has a big heart, he always speaks frankly. He loves football and playing in a competitive team. We can enjoy it, it's great."