The Sunday Express says Manchester United's failure to tie down the star has alerted the Turin club, along with Spanish sides Sevilla and Atletico Madrid. And Ashley Young's arrival raises further questions about Park's long-term future with the champions.
Park has made 117 appearances for United since joining them in 2005 but only last week he revealed his future could lie away from Old Trafford. He said: "I won't be able to show my best after one or two years.
"I don't know how long I can stay at Manchester United."