The Cameroon defender requested his omission from the team's opening league match against Sassuolo on Sunday
Torino president Urbano Cairo is furious about Nicolas N'Koulou's situation at the club and has demanded the defender apologise to his teammates.
N'Koulou, who has been heavily linked with a move to league rivals Roma this summer, missed the Bull's 2-1 win over Sassuolo on Sunday.
The 29-year-old was reported to have requested his omission from Walter Mazarri's team as he hopes to clear his future before the September 2 transfer deadline.
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Even though Roma's interest in N'Koulou continues to grow, Cairo said the Cameroon international - who has two years left on his contract - will not leave Stadio Olimpico Grande Torino this summer.