The midfielder recently left Old Trafford for the Chinese Super League, but he has revealed that PSG wanted to bring him to the French capital last summer.
"We await the final session and I hope that they will both be able to play versus Bordeaux".
"There is no good news this morning", he said.
"We have to wait".
PSG were dealt a blow when Edinson Cavani, who scored the winning penalty against Bordeaux, was unable to come back out for the second half due to injury.
"It is too much". "For the big games in the Champions League, it is absolutely necessary to have key players with a lot of experience". "We don't have another Edi like we don't have another Neymar". We have a Plan D.
"But, if two or three key players are not here, it's our duty to find solutions".More news: Paul Pogba playing to his world-class potential under Ole Gunnar Solskjaer's guidance
"It's super hard. If we miss several players the challenge will be even bigger".
The trio have smashed an incredible 48 goals in the French top flight this season, as the Parisians have opened up a 13-point lead at the Ligue 1 summit.
However, Tuchel says the Italy global is eager to play a part.
That wasn't the end of the world, Kylian Mbappé could play up front, with Julian Draxler and Ángel Di María on the wings.
"Marco Verratti wants to play but he only played 60 minutes once", he said.
Cavani is joined by Meunier in missing the Old Trafford leg after neurological tests revealed light concussion after a heavy collision with Bordeaux's Francois Kamano during Saturday's encounter and PSG added that the Belgium global will be unavailable until at least the end of next week.
Mid-table Bordeaux slumped to a fourth straight loss between league and cup, although they almost equalised on the hour when Francois Kamano's shot from 20 yards was superbly saved by Gianluigi Buffon.