Paris Saint-Germain forward Neymar is expected to be named in the starting line up when the French champions face Borussia Dortmund in the first leg of their Champions League last-16 clash on Wednesday.
The Brazilian forward took part in full training with his teammates on Tuesday after overcoming a rib injury.
Neymar, 28, did not play in the club's 4-4 Ligue 1 draw at Amiens over the weekend when Thomas Tuchel rested some other players.
"He is here, he will train and if all goes well he will play tomorrow. Because for us it changes almost everything when he plays and I hope he will play," said Tuchel.
PSG have been knocked out at this stage in the past three seasons and are desperate to leave a mark on the competition.
"[Neymar] changes everything because if he plays we have his quality and confidence and ability to do decisive.
"It changes everything ... because if he does not play we have no other player with that quality to replace him."
Tuchel, who coached Dortmund for two seasons before going to Paris, will need to devise a plan to stop the Germans' formidable attack, which has scored 22 goals in their five Bundesliga games this year.
