Inter Milan's Lautaro Martinez reacts after his goal was disallowed for offside during the Champions League, group F soccer match between Inter Milan and F.C. Barcelona, at the San Siro stadium in Milan, Italy, Dec 10, 2019. (LUCA BRUNO / AP PHOTO)

BUENOS AIRES — Real Madrid, Barcelona, Chelsea and Manchester City have expressed interest in signing Inter Milan striker Lautaro Martinez, according to the Argentinian's agent.

Martinez has been a revelation for the Italian club this season with 16 goals in 30 matches across all competitions.

The 22-year-old has more than three years left on his contract but his agent, Alberto Yaque, did not rule out a move in the European summer transfer window.

ALSO READ: Martinez's impressive form could cost Inter Milan

"The truth is that we don't know what will happen. We are guided by what is said in the media. [But] I've had calls from Real Madrid, Barcelona, Chelsea and City," Argentina's Ole news service quoted Yaque as saying.

"We only hear the rumors. If there is something between the clubs, we don't know about it," he added.

READ MORE: Lautaro injury could pave way for Icardi return at Inter

Martinez, who joined Inter for 25 million euros (around US$27 million) from Argentina's Racing Club in July 2018, now has an estimated market value of 64 million euros.

Yaque admitted that Martinez would relish the chance to play at Barcelona alongside Argentina national team colleague Lionel Messi.

"Who wouldn't like to play with Messi?," Yaque asked. "Lautaro himself said that it was a dream to play with him in the national team. But he is very reserved and keeps a low profile. It's not something we're talking about."