The 20-year-old joined Atletico from Real Valladolid last summer and has impressed for the club.
“The interest of top clubs like AC Milan and Chelsea is an honour,” his agent Zoran Vekic told Calciomercato.
“In football anything is possible, but until the end of the season we will not take any decision.
“Atletico Madrid has made a major investment in him and together at the end of the season we’ll evaluate the situation.”
Vekic confirmed that Manchester United and Barcelona were interested in signing him last year.
“We know that the Rossoneri have followed him but last year there were also Barcelona and Manchester United and there was also a deal with Fiorentina,” he said.
