But the way PSG capitulated in the second half, when it let in four goals, exposed glaring weaknesses in the team, notably on free kicks.
Tuchel only had six substitutes on his bench for the 5-1 defeat.
PSG played the match with a number of notable absentees, including Neymar, Edinson Cavani and Angel Di Maria.
He has now vented his frustration towards the club's hierarchy for lacking depth in his squad.
The capital side, who would have clinched their eighth title by avoiding defeat, had Juan Bernat sent off before the break after the Spaniard had cancelled out Thomas Meunier's early own goal.
Lille then ran riot in the second half, with Pepe, Jonathan Bamba, Gabriel and Jose Fonte getting on the score-sheet. You can't let in three, four or five, " Mbappe told Canal Plus television. I do not know who can play in Nantes as we will have just 13 or 14 players.
"Today we played like amateurs".
The first half ended with PSG surrounding the referee once again as Thiago Mendes was booked for what they felt was a swipe at Marco Verratti, who was quick to make the most of it.
However, they are still 17 points clear of second-placed Lille and if they win at Nantes on Wednesday they will still win the league with six matches to spare.
"It was a box-to-box game, some moments we were in control, some moments we were not". "Shipping three, four or five goals is not normal". A lack of power cost Bamba a goal when he beat Areola only to see Thilo Kehrer gather the ball short of the line, so he made sure that was not an issue in the 65th minute when he rifled the ball past the keeper at his near post after breaking the offside trap.
"This defeat shows something else, that we have shortcomings every time?"
"Yes, we're missing Lass Diarra and Adrien Rabiot".
"Nobody is saying anything about this, though, as we keep winning".
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