Qarabag's manager, Qurban Qurbanov, has expressed concern over Camilo Duran's imminent move to Celtic.
The £5.5 million transfer has been approved by the London Embassy of Azerbaijan, and Duran has been spotted training with his new team.
Qurbanov admitted he has been informed that the deal is almost complete.
He said: "As for Duran, he has not left the building yet, so we cannot say officially that he has gone.
"A few hours ago, we received a message that everything was close to being completed, but it has not been finalised yet.
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"But he was one of our main players. He played in the Champions League and was one of our best players in Europe.
"He is talented and ambitious, so his departure could be a problem for us."
"I want our team always to have a player like Duran."
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