The 20-year-old has begun the season in impressive form and has been a huge factor in Malaga’s flawless start to their maiden Champions League campaign.
The Spaniard, who represented his country at the London 2012 Olympics over the summer, was also recently watched by Tottenham technical co-ordinator Tim Sherwood during victory over Panathinaikos.
And, despite Malaga's encouraging start to La Liga, Husillos admits the midfielder could yet be sold as soon as January.
"He is our player and is important for the team. He is not on the market," he told tuttomercatoweb.com.
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Despite Husillos' realistic outlook, Isco's mind remains firmly on Malaga and ensuring their bright start to the new campaign continues.
"Malaga is on everyone's mouth now because because of great displays in the Champions League," he told reporters.
"Besides, I have had two good performances and that's why my name has been heard more than anyone. I just have my mind in Malaga."