Kulusevski was pictured trudging off the pitch in Monday's training session with a calf problem and did not earn any minutes in the 6-3 win over Team K-League on Wednesday.
Davies was not ready to take part in the nine-goal thriller either, but Conte has now affirmed that the pair will be in the squad for the clash with Julen Lopetegui's side.
However, new signing Ivan Perisic - who suffered a calf injury in his final appearance for Inter Milan - will be forced to wait a little longer to make his Lilywhites debut.
"Kulusevski and Davies are available for tomorrow's game. Perisic started to work with us," Conte told reporters at his pre-match press conference, as quoted by football.london.
"We have to go step by step because the injury was a serious one but it's good that he started to work with us. When he gets back to London with us he can be involved in more training sessions."
Tottenham will also be without the duo of Fraser Forster and Yves Bissouma for the showdown with Sevilla, with the pair still isolating after returning positive COVID-19 tests.
Conte was also asked about the imminent arrival of Djed Spence, who is now said to be closing in on a £20m switch to the Tottenham Hotspur Stadium from Middlesbrough.
Spurs chairman Daniel Levy has reportedly made a breakthrough in talks with the Riverside club, but Conte refused to be dragged into the transfer conversation.
"About Spence we don't want to comment about speculation because it is disrespectful for all the other players, for the club and the other team. Sure we are always looking to improve the squad if there is the possibility," Conte added.
The 6-3 win over Team K-League also saw Spurs fans enjoy a first glimpse of Pape Matar Sarr, who is now back with the Lilywhites first team after his loan spell at Metz ended.
The 19-year-old spent the 2021-22 campaign back at Les Grenats after his £15m transfer to Tottenham went through last summer, and he was brought on for the second half on Wednesday.
Conte has claimed that Sarr will be the "future" of Tottenham but also hinted that the Senegal midfielder could be sent out on loan again, saying: "He's a young player. Good prospect. Will be the future for Tottenham.
"We have Sarr and other young players and we will try with the club to take the best decision for them. It will be very important to take the best decision about whether to stay at Tottenham or go out on loan and play with regularity."
Following the Coupang Play Series clash with Sevilla, Tottenham will take on Rangers at Ibrox on July 23 before rounding off their friendly fixtures against Roma in the I-Tech Cup in Israel on July 30.