The England striker reportedly wants to leave the team, was not among the group who flew to Portugal on Wednesday for the game.
Kane, 28, did not play Sunday’s 1-0 win against Manchester City, the team who are trying to buy him.
He came back to training late after a post-Euro 2020 holiday in the USA.
“He is getting his fitness better each day,” said boss Nuno Espirito Santo. “He is going to work today, he is going to work tomorrow, he will join the group on Friday and Saturday we will make a decision on whether he could face Wolves on Sunday.”
Nuno has confirmed none of the starting XI who beat Manchester City will face Pacos de Ferreira, who finished fifth in the Portuguese league last season.