Internazionale coach Luciano Spalletti says he will "oppose" the sale of Ivan Perisic.
The Croatia international continues to be a target for Manchester United's Jose Mourinho.
But the Italian coach is determined to keep the 28-year-old at the club.
"Until now, there hasn't been any important contact," he told reporters.
"There was something you already know about at the beginning of the window. There was no follow-up and so, for me, the topic is over.
"It's true what the journalists say: as time goes by, it becomes more and more difficult to replace him with another player.
"I will strongly oppose the sale of Perisic if an offer comes.
"It's clear that the team has underperformed in the past few months. It's clear that there is more quality than was shown last year. That's what we have been working towards."
