Massimiliano Allegri says there is no point in dwelling on the absence of Paul Pogba after the Juventus midfielder was ruled out of the World Cup.
It was announced on Monday that Pogba will play no part in France's bid to retain their title in Qatar due to a knee injury.
Pogba has not played a competitive game for Juve since returning to the Serie A club as a free agent in July after his Manchester United contract expired.
The 29-year-old underwent surgery last month and although he recently returned to training, he must now undergo further rehabilitation.
Bianconeri head coach Allegri says Pogba has been sorely missed, but felt it had looked increasingly unlikely he could play in the World Cup.
He said: "It is useless to repeat what has already been said: once the decision was made not to have an operation at the beginning of the season, it was normal for the hopes that he could return with Juventus and France. They were reduced to a flicker.
"He is sorry for Juventus and the World Cup, it is normal, we have been penalised for not having him available."
Juve will also be without Weston McKennie and Dusan Vlahovic when they face Paris Saint-Germain in the Champions League on Wednesday due to injury.
Allegri revealed he is hopeful striker Vlahovic will return against Inter on Sunday, with Angel Di Maria and Gleison Bremer also set to be back for that Serie A match
The Turin giants will attempt to secure a Europa League spot when they face Group G leaders PSG at Allianz Stadium, while fourth-placed Maccabi Haifa are also in the hunt for third place when they take on Benfica.
Allegri expects his players to use the anger of being knocked out of the Champions League to drive them up the Serie A table.
He said: "I'm angry, not comparing with the best from March onwards creates anger. It has to give us incentives, it has to create a reaction, but we think about the championship after the matches with Inter, Verona and Lazio.
"It is normal that the matches in the Champions League, as results, they are very bad and this shows the results in the league in a more negative way. But we will think about the championship from the day after tomorrow."