Paris Saint-Germain, Inter Milan and Real Madrid are among a host of clubs monitoring Jesse Lingard's situation ahead of the summer transfer window, sources have told ESPN.
Lingard has been in top form since joining West Ham on loan from Manchester United in January, scoring eight goals in nine games to earn a recall to the England squad.
He now has scored in four consecutive games after netting twice in West Ham's 3-2 win over Leicester City on Sunday.
West Ham are keen to sign Lingard permanently at the end of the season but the 28-year-old's performances have alerted a number of top clubs in the Premier League, including the top six, and abroad. He has one year left on his contract at Old Trafford.